CN102221169A - Straight down type LED (light-emitted diode) backlight module and LED structure - Google Patents
Straight down type LED (light-emitted diode) backlight module and LED structure Download PDFInfo
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- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 60
- 238000009792 diffusion process Methods 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 238000010276 construction Methods 0.000 description 30
- 238000000034 method Methods 0.000 description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
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Abstract
A straight down type LED (light-emitted diode) backlight module comprises a base plate, a diffusion plate, a plurality of LEDs arranged between the base plate and the diffusion plate, and a plurality of light scattering elements arranged between the base plate and the diffusion plate, wherein the LEDs are arranged on the base plate, the light scattering elements are used for scattering light emitted by the LED, each light scattering element comprises an arc light inlet surface and a light outlet surface, a plurality of scattering structures are formed on the light outlet surface and comprise at least one first scattering structure, at least one second scattering structure or the combination of the first scattering structure and the second scattering structure, each first scattering structure is an annular groove which is arranged on the light outlet surface in an inwards-concaving way, the bottom surface of the annular groove is an inwards-concaving arc surface, and each second scattering structure is an annular wall which is arranged on the light outlet surface in an outwards-protruding way. The straight down type LED backlight module can meet the requirement of slim type design. The invention also provides an LED structure capable of scattering light emitted by an LED chip.
Description
Technical field
The present invention relates to light source technology, particularly relate to straight-down negative LED backlight module and light emitting diode construction.
Background technology
Liquid crystal indicator is widely used in the electronic products such as personal digital assistant, notebook computer, digital camera, mobile phone, LCD TV.Liquid crystal indicator itself can not be luminous, so it need could produce Presentation Function by module backlight.
A kind of existing straight-down negative LED backlight module generally comprises substrate, diffuser plate and a plurality of light emitting diodes between what substrate and the diffuser plate is set.The distance that diffuser plate and these light emitting diodes are certain at interval, and between light emitting diode and diffuser plate, form a diffusion space.During use, the light that is sent by these light emitting diodes enters diffuser plate through after the diffusion space, passes through the diffusion of diffuser plate again, evenly outgoing in specific actual range.
Yet; in order to strengthen the diffusion effect of light, can increase the height of the diffusion space between light emitting diode and diffuser plate usually, promptly increase the distance between light emitting diode and diffuser plate; so, be difficult to satisfy the demand of the slimming design of straight-down negative LED backlight module.
Summary of the invention
Therefore, the invention provides a kind of straight-down negative LED backlight module, can satisfy the demand of slimming design.
The present invention provides a kind of light emitting diode construction in addition, can carry out scattering to the light that light-emitting diode chip for backlight unit sends.
For reaching above-mentioned advantage, a kind of straight-down negative LED backlight module that the embodiment of the invention provides, it comprise substrate and diffuser plate and be arranged on substrate and diffuser plate between a plurality of light emitting diodes, light emitting diode is arranged on the substrate.Straight-down negative LED backlight module also comprises a plurality of light-scattering components that are arranged between substrate and the diffuser plate, the light that is used for light emitting diode is sent carries out scattering, and at least one in the light-scattering component comprises arc incidence surface and the exiting surface relative with the arc incidence surface, be formed with at least one diffusing structure on the exiting surface, and diffusing structure comprises at least one first diffusing structure, at least one second diffusing structure or its combination.Wherein, each first diffusing structure is that setting to the concave in the annular groove of exiting surface and the bottom surface of annular groove is inner concave arc surface, and each second diffusing structure is for outwards being convexly set in the annular wall of exiting surface.
In an embodiment of the present invention, described diffusing structure for example comprises first diffusing structure of a plurality of concentric settings.
In an embodiment of the present invention, described diffusing structure for example comprises second diffusing structure of a plurality of concentric settings.
In an embodiment of the present invention, each of described second diffusing structure highly for example is set to increase progressively successively along the direction from the middle mind-set periphery of exiting surface.
In an embodiment of the present invention, two side surfaces of described each second diffusing structure for example are set at least one for concave surface.
In an embodiment of the present invention, described diffusing structure for example comprises the combination of first diffusing structure with second diffusing structure of a plurality of concentric settings of a plurality of concentric settings, and described first diffusing structure and second diffusing structure are alternately arranged along the direction from the middle mind-set periphery of exiting surface.
In an embodiment of the present invention, described each light emitting diode for example is packaged LED light lamp, and the LED light lamp card is established and is fixed on the substrate.
In an embodiment of the present invention, described each light emitting diode for example is a light-emitting diode chip for backlight unit again, and each light-scattering component is as the light shield of the combination of the light-emitting diode chip for backlight unit of a light-emitting diode chip for backlight unit or a plurality of different colours.In addition, described light-scattering component is for example corresponding one by one with light-emitting diode chip for backlight unit, and is formed with phosphor powder layer on the arc incidence surface of each light-scattering component.
A kind of light emitting diode construction that the embodiment of the invention provides, it comprises light emitting diode pedestal, light-emitting diode chip for backlight unit and light shield, light emitting diode pedestal and light shield surround accommodation space to accommodate light-emitting diode chip for backlight unit.Light shield comprises arc incidence surface and the exiting surface relative with the arc incidence surface, be formed with at least one diffusing structure on the exiting surface, and diffusing structure comprises at least one annular groove, at least one annular wall or its combination.Wherein, it is inner concave arc surface that each annular groove sets to the concave in exiting surface and bottom surface, and each annular wall outwards is convexly set in exiting surface.
In an embodiment of the present invention, described diffusing structure for example comprises a plurality of annular grooves, and annular groove respectively area surrounded have common common factor, for example each annular groove is provided with one heart.
In an embodiment of the present invention, described diffusing structure for example comprises a plurality of annular wall, and annular wall respectively area surrounded have common common factor, for example each annular wall is provided with one heart.
In an embodiment of the present invention, each of described annular wall highly for example is set to increase progressively successively along the direction from the middle mind-set periphery of exiting surface.
In an embodiment of the present invention, two side surfaces of described each annular wall for example are set at least one for concave surface.
In an embodiment of the present invention, described diffusing structure for example comprises the combination of a plurality of annular grooves and a plurality of annular wall, annular groove respectively area surrounded have common common factor, annular wall respectively area surrounded have common common factor, and annular groove and annular wall are alternately arranged along the direction from the middle mind-set periphery of exiting surface.
In an embodiment of the present invention, described light shield more can comprise phosphor powder layer, is formed on the arc incidence surface.
Summarize it, in the straight-down negative LED backlight module that the embodiment of the invention provides, light emitting diode is provided with light-scattering component, light-scattering component comprises arc incidence surface and the exiting surface relative with the arc incidence surface, be formed with at least one diffusing structure on the exiting surface, diffusing structure comprise inner concave arc surface and evagination in the annular wall of exiting surface at least one of them.Light-scattering component can carry out scattering to the light that light emitting diode sends, and reducing the distance between light emitting diode and diffuser plate, thereby satisfies the demand of the slimming design of straight-down negative LED backlight module.Light shield in the light emitting diode construction that the embodiment of the invention provides has exiting surface and arc incidence surface, is formed with diffusing structure on the exiting surface, and the light that light shield can send the light-emitting diode chip for backlight unit of self carries out scattering, to promote outgoing light homogeneity.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the structural representation of the straight-down negative LED backlight module of first embodiment of the invention.
Fig. 2 A is the schematic perspective view of the light-scattering component of straight-down negative LED backlight module shown in Figure 1.
Fig. 2 B is the three-dimensional cutaway view of the light-scattering component IIB-IIB along the line shown in Fig. 2 A.
Fig. 3 A is the schematic perspective view figure of light-scattering component of the straight-down negative LED backlight module of second embodiment of the invention.
Fig. 3 B is the three-dimensional cutaway view of the light-scattering component IIIB-IIIB along the line shown in Fig. 3 A.
Fig. 4 A is the schematic perspective view of light-scattering component of the straight-down negative LED backlight module of third embodiment of the invention.
Fig. 4 B is the three-dimensional cutaway view of the light-scattering component IVB-IVB along the line shown in Fig. 4 A.
Fig. 5 A is the cross-sectional schematic of light-scattering component, light emitting diode and substrate of the straight-down negative LED backlight module of fourth embodiment of the invention.
Fig. 5 B is the fundamental diagram of the light-scattering component shown in Fig. 5 A.
Fig. 6 is the schematic diagram of buckle structure of light-scattering component of the straight-down negative LED backlight module of one embodiment of the invention.
Fig. 7 is the cutaway view of the light emitting diode construction of fifth embodiment of the invention.
Fig. 8 A is the schematic perspective view of the light shield of light emitting diode construction shown in Figure 7.
Fig. 8 B is the three-dimensional cutaway view of the light shield VIIIB-VIIIB along the line of the light emitting diode construction shown in Fig. 8 A.
Fig. 9 A is the schematic perspective view of light shield of the light emitting diode construction of sixth embodiment of the invention.
Fig. 9 B is the cutaway view of the light shield IXB-IXB along the line of the light emitting diode construction shown in Fig. 9 A.
Figure 10 is the cross-sectional schematic of light shield of the light emitting diode construction of seventh embodiment of the invention.
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, the straight-down negative LED backlight module that foundation the present invention is proposed and the specific embodiment, structure, feature and the effect of light emitting diode construction, describe in detail as after.
Fig. 1 is the structural representation of the straight-down negative LED backlight module of first embodiment of the invention.See also Fig. 1, the straight-down negative LED backlight module 100 of first embodiment of the invention comprise substrate 110, diffuser plate 120, be arranged on a plurality of light emitting diodes 130 between substrate 110 and the diffuser plate 120 and be arranged on substrate 110 and diffuser plate 120 between a plurality of light-scattering components 140.These light emitting diodes 130 are arranged on the substrate 110, for example fix and be electrically connected on the substrate 110, and substrate 110 for example is a printed circuit board (PCB).These light-scattering components 140 cover at respectively on the corresponding light emitting diode 130, and the light that is used for light emitting diode 130 is sent carries out scattering.Diffuser plate 120 and these light emitting diodes 130 certain at interval apart from G, 120 pairs of light through light-scattering component 140 scatterings of diffuser plate are done further diffusion.
In embodiments of the present invention, each light emitting diode 130 for example is packaged LED light lamp, and LED light lamp 130 card establishes and be fixed on the substrate 110, but the present invention is not as limit.In other embodiments, each light emitting diode is a light-emitting diode chip for backlight unit, and each light-scattering component is as the light shield of the combination of the light-emitting diode chip for backlight unit of a light-emitting diode chip for backlight unit or a plurality of different colours.
Fig. 2 A is the schematic perspective view of the light-scattering component of straight-down negative LED backlight module shown in Figure 1.Fig. 2 B is the three-dimensional cutaway view of the light-scattering component IIB-IIB along the line shown in Fig. 2 A.See also Fig. 2 A and Fig. 2 B, the side 147 that some or all of in these light-scattering components 140 of straight-down negative LED backlight module shown in Figure 1 comprises arc incidence surface 142, the exiting surface 143 relative with arc incidence surface 142 and connect incidence surface 142 and exiting surface; Be formed with a plurality of diffusing structures 144 on the exiting surface 143.In the present embodiment, diffusing structure 144 comprises the combination of first diffusing structure 145 with second diffusing structure 146 of a plurality of concentric settings of a plurality of concentric settings, and first diffusing structure 145 and second diffusing structure 146 are alternately arranged along the direction from the middle mind-set periphery of exiting surface 143.Wherein, each first diffusing structure 145 is an inner concave arc surface for setting to the concave in the annular groove of exiting surface 143 and the bottom surface of annular groove, and each second diffusing structure 146 is for outwards being convexly set in the annular wall of exiting surface 143.
During use, the arc incidence surface 142 of the light elder generation directive light-scattering component 140 that light emitting diode 130 sends, 142 pairs of light of arc incidence surface play certain scattering process; Then, first diffusing structure 145 and second diffusing structure 146 of light on arc incidence surface 142 directive exiting surfaces 143.Because first diffusing structure 145 is an annular groove, and second diffusing structure 146 is an annular wall, the concavity structure of annular groove and annular wall can spread light.Light is done further diffusion through directive diffuser plate 120 again after light-scattering component 140 scattering processes by diffuser plate 120.With respect to existing straight-down negative LED backlight module, under the identical situation of outgoing light homogeneity, the setting of light-scattering component 140 can reduce 130 of diffuser plate 120 and light emitting diodes apart from G, thereby satisfy the demand of the slimming design of straight-down negative LED backlight module.In addition, can learn that when remaining when same as the prior art apart from G of 130 of diffuser plate 120 and light emitting diodes, then the straight-down negative LED backlight module 100 of the embodiment of the invention will have better outgoing light homogeneity from another angle.
Need to prove, present embodiment is formed with a plurality of diffusing structures 144 with exiting surface 143 and these diffusing structures 144 comprise that a plurality of first diffusing structures 145 and a plurality of second diffusing structure 146 are example, but the present invention does not limit the quantity of diffusing structure 144, first diffusing structure 145 and second diffusing structure 146.In other embodiments, the quantity of diffusing structure, first diffusing structure and second diffusing structure can be respectively at least one; In other words, when quantity 〉=1 of first diffusing structure, then the quantity of second diffusing structure can be 0, and when quantity 〉=1 of second diffusing structure, then the quantity of first diffusing structure can be 0.In the present embodiment, a plurality of first diffusing structures 145 are concentric setting with a plurality of second diffusing structures 146, but the present invention is not as limit.In other embodiments, the axle center that can depart from light-scattering component a little, the center of circle corresponding, the center of circle of a plurality of first diffusing structure correspondences with a plurality of second diffusing structures.
Fig. 3 A is the schematic perspective view of light-scattering component of the straight-down negative LED backlight module of second embodiment of the invention.Fig. 3 B is the three-dimensional cutaway view of the light-scattering component IIIB-IIIB along the line shown in Fig. 3 A.See also Fig. 3 A and Fig. 3 B, the structural similarity of the structure of the straight-down negative LED backlight module of second embodiment and the straight-down negative LED backlight module 100 of first embodiment, difference is: the diffusing structure that forms on the exiting surface 243 of the light-scattering component 240 of the straight-down negative LED backlight module of second embodiment is first diffusing structure 245 of a plurality of concentric settings, and each first diffusing structure 245 is an inner concave arc surface for setting to the concave in the annular groove of exiting surface 243 and the bottom surface of annular groove.First diffusing structure 245 of diffusing structure is an annular groove, and it can play scattering process to the light that is penetrated by exiting surface 243.
Fig. 4 A is the schematic perspective view of light-scattering component of the straight-down negative LED backlight module of third embodiment of the invention.Fig. 4 B is the three-dimensional cutaway view of the light-scattering component IVB-IVB along the line shown in Fig. 4 A.See also Fig. 4 A and Fig. 4 B, the structural similarity of the structure of the straight-down negative LED backlight module of the 3rd embodiment and the straight-down negative LED backlight module 100 of first embodiment, difference is: the diffusing structure that forms on the exiting surface 343 of the light-scattering component 340 of the straight-down negative LED backlight module of the 3rd embodiment is second diffusing structure 346 of a plurality of concentric settings, and each second diffusing structure 346 is for outwards being convexly set in the annular wall of exiting surface 343.Second diffusing structure 346 of diffusing structure is an annular wall, and it can play scattering process to the light that is penetrated by exiting surface 343.
Fig. 5 A is the cross-sectional schematic of light-scattering component, light emitting diode and substrate of the straight-down negative LED backlight module of fourth embodiment of the invention.See also Fig. 5 A, the structural similarity of the structure of the straight-down negative LED backlight module of the 4th embodiment and the straight-down negative LED backlight module 100 of first embodiment, difference is: each height edge of second diffusing structure 446 of the light-scattering component 440 of the straight-down negative LED backlight module of the 4th embodiment increases progressively successively from the direction of the middle mind-set periphery of exiting surface 443, and two side surfaces of each second diffusing structure 446 are concave surface.
Fig. 5 B is the fundamental diagram of the light-scattering component shown in Fig. 5 A.See also Fig. 5 A and Fig. 5 B, be arranged at the light L process arc incidence surface 442 directive exiting surfaces 443 that the light emitting diode 430 on the substrate 410 sends, the diffusing structure 144 that forms on the exiting surface 443 comprises a plurality of first diffusing structures 445 and a plurality of second diffusing structure 446, wherein, first diffusing structure 445 is an annular groove, and second diffusing structure 446 is an annular wall.After first diffusing structure 445 and 446 pairs of light of second diffusing structure carried out scattering process, divergence of beam penetrated.
Need to prove that in the present embodiment, two side surfaces of second diffusing structure 446 are concave surface, but the present invention is not as limit; In other embodiments, two side surfaces of second diffusing structure 446 wherein any one is a concave surface, another can be the plane, can realize light is carried out the purpose of scattering equally.
Can sum up by the structure of the light-scattering component of the straight-down negative LED backlight module of above-mentioned first embodiment to the, four embodiment and to draw: be formed with at least one diffusing structure on the exiting surface of light-scattering component, and diffusing structure comprise at least one first diffusing structure, at least one second diffusing structure or its combination.
Fig. 6 is the schematic diagram of buckle structure of light-scattering component of the straight-down negative LED backlight module of the embodiment of the invention.The light-scattering component of the straight-down negative LED backlight module of first embodiment of the invention to the four embodiment can be provided with buckle structure.See also Fig. 2 A, 2B and 6, form a plurality of buckle structures 148 with the position near the side 147 of light-scattering component 140 on the arc incidence surface 142 of the light-scattering component 140 of the straight-down negative LED backlight module of first embodiment.Each buckle structure 148 comprises a plurality of base portion 148a and a plurality of hook part 148b that are arranged at base portion 148a end that are located on the arc incidence surface 142.A plurality of base portion 148a are approximately perpendicular to arc incidence surface 142 and are parallel to each other and setting at interval.Accordingly, can offer a plurality of through holes (figure does not show) on the substrate 110, each buckle structure 148 is corresponding with a through hole.During installation, these hook parts 148b of buckle structure 148 passes through hole corresponding on the substrate 110, and makes light-scattering component 140 and substrate 110 clampings.Need to prove that the present invention does not limit the syndeton between light-scattering component and substrate.In addition, when the light emitting diode of straight-down negative LED backlight module of the present invention was light-emitting diode chip for backlight unit, light-scattering component was formed directly on the light emitting diode pedestal.
Fig. 7 is the cross-sectional schematic of the light emitting diode construction of fifth embodiment of the invention.Fig. 8 A is the schematic perspective view of the light shield of light emitting diode construction shown in Figure 7.Fig. 8 B is the three-dimensional cutaway view of the light shield VIIIB-VIIIB along the line of the light emitting diode construction shown in Fig. 8 A.See also Fig. 7, Fig. 8 A and Fig. 8 B, the light emitting diode construction 500 of the 5th embodiment comprises light emitting diode pedestal 510, light-emitting diode chip for backlight unit 520 and light shield 530.Light emitting diode pedestal 510 surrounds accommodation space 512 to accommodate light-emitting diode chip for backlight unit 520 with light shield 530.Light shield 530 comprises arc incidence surface 532 and the exiting surface 533 relative with arc incidence surface 532, is formed with a plurality of diffusing structures on the exiting surface 533.In this enforcement, diffusing structure is a plurality of annular grooves 535, and it is inner concave arc surface that each annular groove 535 sets to the concave in exiting surface 533 and bottom surface.A plurality of annular grooves 535 can play scattering process to the light that is penetrated by exiting surface 533.
In the present embodiment, a plurality of annular grooves 535 are provided with one heart, but invention is not as limit, in other embodiments, the center of a plurality of annular groove correspondences can be departed from the axle center of light shield a little, simultaneously a plurality of annular grooves respectively area surrounded have common common factor.
In the present embodiment, light shield 530 is corresponding one by one with light-emitting diode chip for backlight unit 520, is formed with phosphor powder layer 530a on the arc incidence surface 532 of light shield 530, and phosphor powder layer 530a and single color LED chip 520 are used, and can produce white light.Need to prove, in other embodiments, a plurality of light-emitting diode chip for backlight unit can corresponding light shield, and when these light-emitting diode chip for backlight unit were the combination of red light emitting diodes chip, green LED chip and blue led chips, phosphor powder layer can omit.
Fig. 9 A is the schematic perspective view of light shield of the light emitting diode construction of sixth embodiment of the invention.Fig. 9 B is the three-dimensional cutaway view of the light shield of the light emitting diode construction IXB-IXB along the line shown in Fig. 9 A.See also Fig. 9 A and Fig. 9 B, the light emitting diode construction of the 6th embodiment is similar to the light emitting diode construction 500 of the 5th embodiment, difference is: be formed with the combination that a plurality of diffusing structures 634 comprise a plurality of annular grooves 635 and a plurality of annular wall 636 on the exiting surface 633 of the light shield 630 of the light emitting diode construction of the 6th embodiment, and annular groove 635 is alternately arranged from the direction of the middle mind-set periphery of exiting surface 633 with annular wall 636 edges, wherein, it is inner concave arc surface that each annular groove 635 sets to the concave in exiting surface 633 and bottom surface, and each annular wall 636 outwards is convexly set in exiting surface 633; Each height edge of a plurality of annular wall 636 increases progressively (line of each height is a camber line in other words) successively from the direction of the middle mind-set periphery of exiting surface 633, at least one in two side surfaces of each annular wall 636 is concave surface.The present invention does not limit the height of a plurality of annular wall, and in other embodiments, the height of a plurality of annular wall can be identical.Annular groove 635 and a plurality of annular wall 636 can play scattering process to the light that is penetrated by exiting surface 633.
In the present embodiment, a plurality of annular grooves 635 and a plurality of annular wall 636 are concentric setting, but invention is not as limit, in other embodiments, the center of a plurality of annular groove correspondences can be departed from the axle center of light shield a little, simultaneously a plurality of annular grooves respectively area surrounded have common common factor; The center of a plurality of annular wall correspondences also can be departed from the axle center of light shield a little, simultaneously a plurality of annular wall respectively area surrounded have common common factor.
Need to prove, present embodiment is formed with a plurality of diffusing structures 634 with exiting surface 633 and these diffusing structures 634 comprise that a plurality of annular grooves 635 and a plurality of annular wall 636 are example, but the present invention does not limit the quantity of diffusing structure 634, annular groove 635 and annular wall 636.In other embodiments, the quantity of diffusing structure, annular groove and annular wall can be respectively at least one; In other words, when quantity 〉=1 of annular groove, the quantity of annular wall can be 0, and when quantity 〉=1 of annular wall, the quantity of annular groove can be 0.
Figure 10 is the cross-sectional schematic of light shield of the light emitting diode construction of seventh embodiment of the invention.See also Figure 10, the light shield of the light emitting diode construction of the 7th embodiment is similar to the light emitting diode construction of the 6th embodiment, and difference is: be formed with a plurality of diffusing structures on the exiting surface 733 of the light shield 730 of the light emitting diode construction of the 3rd embodiment and only be a plurality of annular wall 736.Each height edge of a plurality of annular wall 736 increases progressively successively from the direction of the middle mind-set periphery of exiting surface 733.A plurality of annular wall 736 can play scattering process to the light that is penetrated by exiting surface 733.
Can sum up by the light emitting diode construction of above-mentioned the 5th embodiment to the seven embodiment and to draw: be formed with at least one diffusing structure on the exiting surface of light shield, and diffusing structure comprise at least one annular groove, at least one annular wall or its combination.
In sum, the straight-down negative LED backlight module of the embodiment of the invention and light emitting diode construction have following advantage at least:
1. in the straight-down negative LED backlight module of the embodiment of the invention, light emitting diode is provided with light-scattering component, light-scattering component comprises arc incidence surface and the exiting surface relative with the arc incidence surface, be formed with at least one diffusing structure on the exiting surface, and diffusing structure comprise inner concave arc surface and evagination in the annular wall of exiting surface at least one of them.Light-scattering component can carry out scattering to the light that light emitting diode sends, and reducing the distance between light emitting diode and diffuser plate, thereby satisfies the demand of the slimming design of straight-down negative LED backlight module.
2. in the straight-down negative LED backlight module of the embodiment of the invention, light-scattering component is provided with buckle structure, and light-scattering component is connected with substrate by buckle structure, can realize removably connecting of light-scattering component and substrate.
3. in the light emitting diode construction of the embodiment of the invention, light-emitting diode chip for backlight unit is provided with light shield, light shield comprises arc incidence surface and the exiting surface relative with the arc incidence surface, be formed with at least one diffusing structure on the exiting surface, diffusing structure comprise inner concave arc surface and evagination in the annular wall of exiting surface at least one of them.Light shield can carry out scattering to the light that light-emitting diode chip for backlight unit sends, to promote the outgoing light homogeneity of light emitting diode construction.
4. in the light emitting diode construction of the embodiment of the invention, at least one is a concave surface in two side surfaces of the annular wall of diffusing structure, to strengthen the dispersion effect to light.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (16)
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| CN201110174470A CN102221169B (en) | 2011-06-27 | 2011-06-27 | Straight down type LED (light-emitted diode) backlight module and LED structure |
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| CN201110174470A CN102221169B (en) | 2011-06-27 | 2011-06-27 | Straight down type LED (light-emitted diode) backlight module and LED structure |
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| CN103672568A (en) * | 2012-09-04 | 2014-03-26 | 展晶科技(深圳)有限公司 | Direct type backlight module |
| CN103883933A (en) * | 2012-12-22 | 2014-06-25 | 鸿富锦精密工业（深圳）有限公司 | Manufacturing method of backlight module |
| WO2015172417A1 (en) * | 2014-05-13 | 2015-11-19 | 深圳市华星光电技术有限公司 | Direct-lit backlight module |
| CN110346969A (en) * | 2019-06-14 | 2019-10-18 | 惠州市华星光电技术有限公司 | A kind of backlight module and display device |
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| CN1690811A (en) * | 2004-04-21 | 2005-11-02 | 日东电工株式会社 | direct backlight |
| CN1851540A (en) * | 2005-04-22 | 2006-10-25 | 三星电子株式会社 | Optical package, optical lens and backlight assembly and display device |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690811A (en) * | 2004-04-21 | 2005-11-02 | 日东电工株式会社 | direct backlight |
| CN1851540A (en) * | 2005-04-22 | 2006-10-25 | 三星电子株式会社 | Optical package, optical lens and backlight assembly and display device |
| CN101295044A (en) * | 2007-04-27 | 2008-10-29 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672568A (en) * | 2012-09-04 | 2014-03-26 | 展晶科技(深圳)有限公司 | Direct type backlight module |
| CN103883933A (en) * | 2012-12-22 | 2014-06-25 | 鸿富锦精密工业（深圳）有限公司 | Manufacturing method of backlight module |
| WO2015172417A1 (en) * | 2014-05-13 | 2015-11-19 | 深圳市华星光电技术有限公司 | Direct-lit backlight module |
| CN110346969A (en) * | 2019-06-14 | 2019-10-18 | 惠州市华星光电技术有限公司 | A kind of backlight module and display device |
| US11353744B2 (en) | 2019-06-14 | 2022-06-07 | Huizhou China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102221169B (en) | 2012-10-03 |
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