CN204437994U - A kind of Novel LED backlight illumination light-distribution lens - Google Patents
A kind of Novel LED backlight illumination light-distribution lens Download PDFInfo
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- CN204437994U CN204437994U CN201520106979.0U CN201520106979U CN204437994U CN 204437994 U CN204437994 U CN 204437994U CN 201520106979 U CN201520106979 U CN 201520106979U CN 204437994 U CN204437994 U CN 204437994U
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Abstract
The utility model relates to backlighting technology field, specifically refers to a kind of Novel LED backlight illumination light-distribution lens.The bottom composite surface of described lens comprise a sub-composite surface, when described sub-composite surface along cross lens body central shaft any direction cut open time, on the hatching of sub-composite surface, the central shaft of the normal of any point in section and described lens body intersects at the below of lens body; Described bottom composite surface also comprises a transition face, and the side of described transition face is connected with the bottom of the described plane of incidence, and opposite side is connected with the top of described sub-composite surface; The height of hatching bottom the distance lens body of one end of sub-composite surface of described transition face is greater than the height of bottom bottom lens body of the plane of incidence, the light that such setting can make LED send all enters lens body by the plane of incidence, can provide the space of needs again for the optimal design-aside of sub-composite surface.
Description
Technical field
The utility model relates to backlighting technology field, specifically refers to a kind of Novel LED backlight illumination light-distribution lens.
Background technology
The back lighting mode of the LED-backlit illumination of present liquid crystal display television and LED panel lamp etc. has two kinds usually with light structures: a kind of side (LED light axle is substantially vertical with light guide plate side) for plurality of LEDs being placed on light guide plate, the light that LED sends enters into light guide plate through light guide plate side, there is multiple total reflection and refraction in light guide plate after, finally all light transmits through the front of light guide plate, by accurately controlling light guide plate reflection and the ratio of refraction, uniform exiting surface can be formed in light guide plate front; This mode is often referred to as side entering type lighting system.
Another plurality of LEDs light source is placed on the diffuser plate back side (in this method, LED light axle is substantially vertical with the diffuser plate back side), in order to the irradiation of uniform light sent by LED is at the diffuser plate back side, need between each LED and diffuser plate, place a secondary light-distribution lens, after the light that LED sends by light-distribution lens carries out secondary distribution, be radiated at the back side of diffuser plate uniformly; Such light enters into diffuser plate inside through the diffuser plate back side and spreads again, goes out to shoot out from the front of diffuser plate, and can form uniform exiting surface in diffuser plate front, this mode is often referred to as straight-down negative lighting system.
Above-mentioned two kinds of lighting systems are compared, and form same lighting area, and the light travel path of side entering type is much larger than straight-down negative, and the light extraction efficiency of side entering type is low, so adopt, its energy consumption of lighting system of side entering type is high, cost is high.
In recent years along with further application and the popularization of the LED-backlit illumination of display (such as flat panel television display) and the product of LED panel lamp etc.The power conservation requirement of corresponding product and the demand of cost control are also come urgently; Traditional side entering type lighting system that under such background, efficiency is lower is progressively being replaced by straight-down negative lighting system.
The development trend of current LED downward back optical illumination is: under the prerequisite as far as possible increasing the spacing (mainly in order to reduce LED quantity in same area) between LED, reduce the thickness (mainly in order to reduce system bulk) from LED light source to diffuser plate, also will ensure the uniformity of irradiating simultaneously.This has higher requirement to light-distribution lens.
In prior art, in order to increase the spacing between LED, compress the distance between LED and diffuser plate simultaneously, as shown in Figure 1, some straight-down negative systems adopt reflective lens to carry out secondary distribution to the light that LED sends, light 120 scioptics 130 allowing the LED110 of considerable part send reflex on the reflector layer 140 on system inner chamber, and then to reflex on diffuser plate 150.Although this lighting system can reduce spatial altitude, the characteristic of reflector layer is relied on comparatively large, require higher to the surface precision of lens and the smooth depth of installation accuracy and reflector layer etc. simultaneously, therefore more difficultly realize Uniform Illumination.
The straight-down negative system also had now adopts refraction type lens to carry out secondary distribution to the light that LED sends, but be difficult to spacing distance between LED large and the spacing of LED and diffuser plate is little realize Uniform Illumination.
As shown in Figure 2, one of reason causing illumination unevenness is that lens 220 plane of incidence 221 is fairly simple with the face shape of exit facet 223, the plane of incidence of some lens and exit facet adopt many spheres to be spliced, the simple conical surface of some employings, this light that LED light source is sent is difficult to effectively distribute in polarizers of big angle scope according to the demand of back lighting.
Another major reason is light when propagating in different medium, and light is by always also existing Fresnel boundary reflection during interface, and the larger Fresnel boundary reflection effect of incident angle is more obvious.When usually propagating from optically thinner medium to optically denser medium, after incidence angle is greater than 60 °, the increase along with incidence angle is risen by its Fresnel boundary reflection rate; From optically denser medium to optically thinner medium, during transmission, Fresnel boundary reflection is then more remarkable, and after incidence angle is greater than 30 °, the increase along with incidence angle is sharply risen by its Fresnel boundary reflection rate.
The light sent from LED light source enters lens body after the refraction of the plane of incidence, when reaching exit facet, some light reflects away through exit facet, and in addition some light by boundary reflection to lens interior, this part reflection ray is after the multiple reflections and refraction of lens base or system inner chamber reflecting surface etc. multiple, above LED, gathering of light (illumination) can be formed by mid portion region, have a strong impact on the uniformity of lens outgoing light field.
With reference in figure 2, sent the light 231 entering lens 220 by the LED light source 210 be positioned at below the plane of incidence and can be separated when arriving exit facet 223, become refracted ray 232 and Fresnel reflected rays 233.Usual refracted ray 232 can carry most of energy and directly be mapped to diffuser plate 250, Fresnel reflected rays 233 then can be carried small part energy and is reflected back lens interior, then through bottom lens body 222 or lens body bottom under reflections off objects after form secondary reflection light 234, reflect lens when secondary reflection light 234 encounters exit facet 223 again and become light 235, light 235 is advanced after stretch journey and is arrived diffuser plate 250.Can find out that light 235 can by mid portion region gather above LED210 by light course.Because light 231 is enter optically thinner medium by optically denser medium when arriving exit facet 223, therefore Fresnel boundary reflection effect is comparatively obvious, there is higher reflectivity, therefore the phenomenon leaning on mid portion zonal ray (energy) to gather above the LED210 caused due to Fresnel boundary reflection is comparatively remarkable, finally has influence on the uniformity of back lighting.
Utility model content
In order to realize the even optical illumination effect of straight-down negative, the utility model provides a kind of direct-light type LED backlight even optical illumination light-distribution lens, the accumulation of the emergent ray caused by Fresnel boundary reflection in center light field can be reduced, reasonable layout emergent ray, the usage quantity that can reduce the LED light source on LED-backlit panel under the prerequisite realizing same illuminating effect can also realize the thickness reduced from LED light source to diffuser plate simultaneously, reduces the volume of system.
In order to realize above-mentioned technique effect, the utility model takes following technical scheme:
In order to overcome the above problems, the utility model proposes a kind of Novel LED backlight illumination light-distribution lens, comprise lens body, wherein said lens body comprises exit facet, the plane of incidence and bottom composite surface;
Described bottom composite surface is positioned at the bottom of described lens body, is connected with the described plane of incidence near the side of lens body central shaft;
The described plane of incidence is positioned at the bottom centre of described lens body, caves in lens body top-direction;
Described bottom composite surface is provided with a sub-composite surface, when described sub-composite surface along cross lens body central shaft any direction cut open time, on the hatching of sub-composite surface, the central shaft of the normal of any point in section and described lens body intersects at the below of lens body;
Described bottom composite surface also comprises a transition face, and the side of described transition face is connected with the bottom of the described plane of incidence, and opposite side is connected with the top of described sub-composite surface; When lens body central shaft any direction is cut open excessively on edge, the height of hatching bottom the distance lens body of one end of sub-composite surface of described transition face is greater than the height of bottom bottom lens body of the plane of incidence.The light that such setting can make LED send all enters lens body by the plane of incidence, can provide the space of needs again for the optimal design-aside of sub-composite surface.Because present stage LED chip height general very low, the design that the bottom surface of the plane of incidence is drop-down, better can ensure that the light that LED sends all enters lens body by the plane of incidence, avoids light energy losses; Moreover, the design that the hatching of transition face is greater than the height of bottom bottom lens body of the plane of incidence near one end of sub-composite surface apart from the height bottom lens body has also reserved enough spaces for arranging of sub-composite surface.
The part Fresnel boundary reflection light that described exit facet reflects by described sub-composite surface reflects away to the direction away from lens body central shaft, significantly reduce the accumulation of the light source upper area light caused by Fresnel boundary reflection light like this, add the intensity of the light field departing from lens centre, improve the even photosensitiveness of outgoing light field.
Further, described sub-composite surface be arranged on illumination bottom lens body from peak value to the region of 10% peak value in.The illumination of this lens base, mainly from the Fresnel boundary reflection light of exiting surface, arranges the unreasonable problem of distribution of light caused by Fresnel boundary reflection light that sub-composite surface just can effectively improve due to exiting surface in the region that the illumination of bottom is concentrated.(the described sub-composite surface illumination be arranged on bottom lens body refers in the region of 10% peak value that from peak value the illumination bottom lens body is provided with sub-composite surface from peak value in the region of 10% peak value, and the concrete setting position of described sub-composite surface and coverage specifically can use according to lens and need flexible modulation).
In general, can be relatively concentrated on an endless belt through the Fresnel boundary reflection light of lens body exit facet in lens body bottom surface in real work, between bottom the ring belt area of this Fresnel boundary reflection light Relatively centralized and the plane of incidence of lens body, there is certain transitional region; There is again an illumination peak region in the endless belt simultaneously due to above-mentioned illumination integrated distribution, the Fresnel boundary reflection light reflected from exit facet received by this region accounts for the overwhelming majority of total reflected light line, and described sub-composite surface only needs to be arranged on this region and most Fresnel boundary reflection light can be realized to reflect away towards the direction of departing from lens body central shaft.Sub-composite surface is larger at the angle of inclination in this region simultaneously, and the Fresnel boundary reflection light that more can effectively be reflected by described exit facet reflects away to the direction away from lens body central shaft; But in space limited bottom backlight lens, be difficult to meet such angle of inclination, and the setting of transition face, for realizing this goal, provide good solution route.Height by transition face near the side of sub-composite surface relative to lens base is heightened, and makes it higher than the height of lens entrance face distance from bottom lens body, so just leaves enough spaces for sub-composite surface arranges large angle of inclination at illumination peak region.By a transition face tilted between sub-composite surface and the plane of incidence, by transition face, reduce the height of lens, the light that LED light source sends can be collected better, again can in limited space, the setting for sub-composite surface leaves enough spaces.
Preferred as one, described sub-composite surface hatching is straight line; Sub-composite surface is like this equivalent to a taper seat, and structure is simple, is convenient to make.
Preferred as one, described sub-composite surface hatching is curve, and the design of curve can according to the face shape of the sub-composite surface of position flexible modulation of the zone of reflections, to reach optimum light-out effect.
Preferred as one, described sub-composite surface hatching is relative to the curve to lower convexity bottom lens; Angle on described sub-composite surface hatching bottom the tangent line of any point and described lens body, to by increasing gradually through the direction of lens body central shaft.
Further, described LED exiting surface flushes or higher than bottom the plane of incidence, can ensure that light that light source sends all enters lens body after the plane of incidence like this, and can not to shine directly into bottom lens on composite surface, and lose part energy of light source, it also avoid the situation that uniformity is irradiated in veiling glare impact caused thus simultaneously.
Preferred as one, described sub-composite surface is connected with lens body bottom margin through bottom surface.The utility model lens are provided with bottom surface between sub-composite surface and lens bottom margin, make that there is bottom rims of the lens suitable thickness, ensure the stability of lens arrangement, be convenient to the preparation of lens, bottom surface is when lens are installed and used simultaneously, can installed surface be served as, facilitate lens to install and use.
Preferred as one, in order to improve the even photosensitiveness of outgoing light field further, sub-composite surface is set to hair side.The principal direction of the light reflected through sub-composite surface so does not change, or reflect towards design away from the direction of described lens body central shaft, but the even photosensitiveness of reflection ray is further improved, be conducive to improving the pockety phenomenon of light on diffuser plate caused by the regular secondary reflection of sub-composite surface.
This patent provides a kind of backlight illuminating system further, comprises the LED light source that is arranged on pcb board and is arranged on above LED light source to realize this direct-type backlight LED lens of secondary light-distribution.Such system can in same lighting area and under the prerequisite of same illuminance uniformity, realize increasing the distance between LED light source, reduce LED quantity, and shorten the distance between LED light source and diffuser plate, the cost of direct-light type LED backlight illuminator is declined, volume-diminished.
Further, described system also comprises diffuser plate, and described diffuser plate is arranged on the front of described lens.The light that LED light source on pcb board can further send by the application of described diffuser plate is better, evenly be diffused into exiting surface.
Further, described system also comprises reflecting layer, and described reflecting layer is positioned at the front of described pcb board and described pcb board fits tightly; Although refraction type secondary light-distribution lens is very low to the degree of dependence in reflecting layer in use the utility model, the use in reflecting layer can improve the optical energy utilization efficiency of backlight illuminating system better, reaches energy-saving effect well.
The utility model also provides a kind of TV, comprises backlight illuminating system, and described backlight illuminating system comprises the LED light source that is arranged on pcb board and is arranged on above LED light source to realize this direct-type backlight LED lens of secondary light-distribution.
The utility model also provides a kind of panel light, comprises backlight illuminating system, described backlight illuminating system comprise realize secondary light-distribution this patent described in Novel LED backlight illumination light-distribution lens.
the utility model has following beneficial effect:this Novel LED backlight illumination light-distribution lens, the accumulation problem of the emergent ray caused by Fresnel boundary reflection in center light field can be reduced, improve the even photosensitiveness backlight illuminating system, the LED light source usage quantity of LED-backlit illuminator can be reduced under the prerequisite realizing same illuminating effect, the thickness from LED light source to diffuser plate can also be reduced simultaneously, reduce the volume of system.
The utility model lens improve the problem that the illumination light field central shaft near zone light in prior art caused by Fresnel boundary reflection is piled up in a word, improve the distribution of outgoing light field after lens.Under the prerequisite of same illuminance uniformity, can realize increasing the distance between LED light source, reduce LED quantity, and shorten the distance between LED light source and diffuser plate, the cost of direct-light type LED backlight illuminator is declined, volume-diminished.
Accompanying drawing explanation
Fig. 1 is reflective backlight lens combination schematic diagram in prior art.
Fig. 2 is the system schematic of refraction type backlight lens in prior art.
Fig. 3 is the perspective view of embodiment 1.
Fig. 4 is the generalized section of embodiment 1.
Fig. 5 is the upward view of embodiment 1.
Fig. 6 is embodiment 1 light source intensity angular distribution schematic diagram.
Fig. 7 is the light intensity angular distribution schematic diagram of embodiment 1 light source after these lens.
Fig. 8 is the generalized section of embodiment 2.
Fig. 9 is the generalized section of embodiment 2.
Detailed description of the invention
Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
In order to realize above-mentioned technique effect, the utility model takes following technical scheme: the utility model provides a kind of Novel LED backlight illumination light-distribution lens, the accumulation of Fresnel boundary reflection light in illumination light field central area can be reduced, improve the even photosensitiveness of outgoing light field, the usage quantity of the light source on LED-backlit panel can be reduced under the prerequisite realizing same illumination uniformity, reduce the thickness from LED light source to diffuser plate, reduce the volume of system.
In order to realize above-mentioned technique effect, the utility model takes following technical scheme:
In order to overcome the above problems, the utility model proposes a kind of Novel LED backlight illumination light-distribution lens, as shown in Figure 3, Figure 4, comprise lens body 300, wherein said lens body 300 comprises exit facet 302, the plane of incidence 301 and bottom composite surface 303; Described exit facet 302, the plane of incidence 301 and bottom composite surface 303 are all coaxial with lens body 300;
Wherein said exit facet 302 is the outer surface of the top of described lens body 300, and the bottom of described exit facet 302 is connected with the bottom composite surface 303 of described lens body 300 (also can be connected with bottom composite surface 303 through side 304);
Described bottom composite surface is positioned at the bottom of described lens body 303, is connected with the described plane of incidence 301 near the side of lens body 300 central shaft;
The described plane of incidence 301 is positioned at the bottom centre of described lens body 300, top-direction depression above lens body 300.
Further, described bottom composite surface 303 comprise sub-composite surface 303-1, described sub-composite surface 303-1 is along the section crossing lens body central shaft, and on the hatching cut open, the normal FF ' of any point and the central shaft OO ' of described lens body intersect at the below (as shown in Figure 4) of lens body.
Described bottom composite surface also comprises a transition face 303-2, and the side of described transition face 303-2 is connected with the bottom of the described plane of incidence 301, and opposite side is connected with the top of described sub-composite surface 303-1; When lens body central shaft OO ' any direction is cut open excessively on edge, the height of hatching bottom the distance lens body of one end of sub-composite surface of described transition face is greater than the height of bottom bottom lens body of the plane of incidence.
Such transition face arranges the light that LED can be made to send and all enters lens body by the plane of incidence, can provide the space of needs again for the optimal design-aside of sub-composite surface.Because present stage LED chip height general very low, the design that the bottom surface of the plane of incidence is drop-down, better can ensure that the light that LED sends all enters lens body by the plane of incidence, avoids light energy losses; Moreover, the design that the hatching of transition face is greater than the height of bottom bottom lens body of the plane of incidence near one end of sub-composite surface apart from the height bottom lens body has also reserved enough spaces for arranging of sub-composite surface.
Further, described sub-composite surface be arranged on illumination bottom lens body from peak value to the region of 10% peak value in.
In general, can be relatively concentrated on an endless belt through the Fresnel boundary reflection light of lens body exit facet in lens body bottom surface in real work, between bottom the ring belt area of this Fresnel boundary reflection light Relatively centralized and the plane of incidence of lens body, there is certain transitional region; There is again an illumination peak region in the endless belt simultaneously due to above-mentioned illumination integrated distribution, the Fresnel boundary reflection light reflected from exit facet received by this region accounts for the overwhelming majority of total reflected light line, only need to arrange described sub-composite surface in this region, most Fresnel boundary reflection light can be realized to reflect away towards the direction of departing from lens body central shaft.Sub-composite surface is larger at the angle of inclination in this region simultaneously, and the Fresnel boundary reflection light that more can effectively be reflected by described exit facet reflects away to the direction away from lens body central shaft; But in space limited bottom backlight lens, be difficult to meet such angle of inclination, and the setting of transition face, for realizing this goal, provide good solution route.
Height in addition by transition face near the side of sub-composite surface relative to lens base is heightened, make it higher than the height of lens entrance face distance from bottom lens body, so just leave enough spaces for sub-composite surface arranges large angle of inclination at illumination peak region.By a transition face tilted between sub-composite surface and the plane of incidence, do not affecting on the basis to Fresnel boundary reflection light efficiency, pass through transition face, height bottom the plane of incidence of reduction lens, make in limited space, the light that LED light source sends can be collected better, enough spaces can be left for the setting of sub-composite surface again.
Further, the exiting surface of described LED light source flushes or higher than bottom the plane of incidence, can ensure that light that light source sends all enters lens body after the plane of incidence like this, and can not shine directly into bottom lens on composite surface, avoid not controlled veiling glare to affect illumination uniformity.
Preferred as one, as shown in Figure 4, described sub-composite surface is connected with lens body bottom margin through bottom surface 303-3.Make to have suitable thickness bottom rims of the lens, ensure the stability of lens arrangement, be convenient to the preparation of lens, bottom surface is when lens are installed and used simultaneously, can serve as installed surface, facilitates lens to install and uses.
Preferred as one, in order to improve the even photosensitiveness of outgoing light field further, sub-composite surface is set to hair side.The principal direction of the light reflected through sub-composite surface so does not change, or reflect towards design away from the direction of described lens body central shaft, but the even photosensitiveness of reflection ray is further improved, be conducive to improving the non-uniform phenomenon in the distribution of diffuser plate glazed thread caused by the regular secondary reflection of sub-composite surface.
This patent provides a kind of backlight illuminating system further, and comprise the LED light source that is arranged on pcb board and be arranged on to realize this direct-type backlight LED lens of secondary light-distribution above LED light source, described lens are said lens.Such system can in same lighting area and under the prerequisite of same illuminance uniformity, realize increasing the distance between LED light source, reduce LED quantity, and shorten the distance between LED light source and diffuser plate, the cost of direct-light type LED backlight illuminator is declined, volume-diminished.
Further, described system also comprises diffuser plate, and described diffuser plate is arranged on the front of described lens.The light that LED light source on pcb board can further send by the application of described diffuser plate is better, evenly be diffused into exiting surface.
Further, described system also comprises reflecting layer, and described reflecting layer is positioned at the front of described pcb board and described pcb board fits tightly; Although refraction type secondary light-distribution lens is very low to the degree of dependence in reflecting layer in use the utility model, the use in reflecting layer can improve the optical energy utilization efficiency of backlight illuminating system better, reaches energy-saving effect well.
The utility model also provides a kind of TV, comprise backlight illuminating system, described backlight illuminating system comprises the LED light source that is arranged on pcb board and is arranged on to realize this direct-type backlight LED lens of secondary light-distribution above LED light source, and described lens are Novel LED backlight illumination light-distribution lens described in this patent.
The utility model also provides a kind of panel light, comprises backlight illuminating system, described backlight illuminating system comprise realize secondary light-distribution this patent described in Novel LED backlight illumination light-distribution lens.
The utility model is not limited to aforesaid detailed description of the invention.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Embodiment 1
The bottom composite surface of the backlight lens in the present embodiment comprises sub-composite surface, described sub-composite surface intersects at the below of described lens body along the normal of any point and the central shaft of described lens body on the hatching cut open of mistake lens body central shaft, and the hatching of described sub-composite surface is relative to the curve to lower convexity bottom lens; The present embodiment neutron composite surface is connected with bottom the plane of incidence by transition face 303-2 near the side of lens body central shaft; Height on the hatching of described transition face 303-2 bottom any point distance lens body reduces gradually to the direction of the bottom near the plane of incidence; The opposite side of the present embodiment neutron composite surface is connected with the edge bottom lens by bottom surface 303-3; The Stability Analysis of Structures of the present embodiment lens, easily processes, easy for installation.As shown in Fig. 3, Fig. 4 and Fig. 5, (wherein Fig. 3 is the perspective view of the present embodiment to the present embodiment lens arrangement; Fig. 4 is the generalized section of the present embodiment; Fig. 5 is the upward view of the present embodiment).Novel LED backlight illumination light-distribution lens in the present embodiment, can be shaping by the mode of injection moulding or hot pressing.
The light distribution signal of the light source of the present embodiment as shown in Figure 6, by the output intensity distribution signal after the secondary light-distribution of these lens as shown in Figure 7, reduce the distribution density of lensed tip center low-angle light, improve the light distribution of-50 ° to-75 ° and 50 ° to 75 °, like this when these lens are used for back lighting, in larger angular range, Uniform Illumination field is formed to the luminous energy on diffuser plate by these lens secondary light-distribution array irradiates, reasonable layout emergent ray, the usage quantity of the LED light source on LED-backlit panel can be reduced under the prerequisite of same illuminating effect, reduce the thickness from LED light source to diffuser plate, the volume of reduction system.
Embodiment 2
As shown in Figure 8, the bottom composite surface of the backlight lens in the present embodiment comprises sub-composite surface, described sub-composite surface intersects at the below of described lens body along the normal of any point and the central shaft of described lens body on the hatching cut open of mistake lens body central shaft, the hatching of described sub-composite surface is the curve relative to upwards caving in bottom lens, these sample embodiment lens can carry out the angle of the sub-composite surface of flexible modulation and described lens body bottom surface according to the position of the zone of reflections, to reach optimum light-out effect.
Embodiment 3
As shown in Figure 9, the bottom composite surface of the backlight lens in the present embodiment comprises sub-composite surface, described sub-composite surface intersects at the below of described lens body along the normal of any point and the central shaft of described lens body on the hatching cut open of mistake lens body central shaft, and the hatching of described sub-composite surface is straight line; Sub-composite surface is like this equivalent to a taper seat, and structure is simple, is convenient to make.
Be only preferred embodiment of the present utility model described in upper, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalently to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a Novel LED backlight illumination light-distribution lens, comprises lens body, and wherein said lens body comprises exit facet, the plane of incidence and bottom composite surface; Described bottom composite surface is positioned at the bottom of described lens body, is connected with the described plane of incidence near the side of lens body central shaft; The described plane of incidence is positioned at the bottom centre of described lens body, caves in lens body top-direction; It is characterized in that: described bottom composite surface is arranged a sub-composite surface and a transition face, the side of described transition face is connected with the bottom of the described plane of incidence, and opposite side is connected with the top of described sub-composite surface;
Described transition face is greater than the height of bottom bottom lens body of the plane of incidence along the height of hatching bottom the distance lens body of one end of sub-composite surface that lens body central shaft any direction is cut open.
2. Novel LED backlight illumination light-distribution lens as claimed in claim 1, it is characterized in that, when along cross lens body central shaft any direction cut open time, on the hatching of sub-composite surface, the central shaft of the normal of any point in section and described lens body intersects at the below of lens body.
3. Novel LED backlight illumination light-distribution lens as claimed in claim 1, is characterized in that, described sub-composite surface be arranged on illumination bottom lens body from peak value to the region of 10% peak value in.
4. Novel LED backlight illumination light-distribution lens as claimed in claim 3, it is characterized in that, described sub-composite surface hatching is straight line or curve.
5. Novel LED backlight illumination light-distribution lens as claimed in claim 1, it is characterized in that, described sub-composite surface is connected with lens body bottom margin through bottom surface.
6. the Novel LED backlight illumination light-distribution lens as described in one of claim 1 to 5, is characterized in that, described LED exiting surface flushes or higher than bottom the plane of incidence.
7., as right wants the Novel LED backlight illumination light-distribution lens as described in 6, it is characterized in that, described sub-composite surface is hair side.
8. a backlight illuminating system, comprise the direct-type backlight LED lens established and realize secondary light-distribution, it is characterized in that, described lens are one of claim 1 to 7 lens.
9. a TV, comprises backlight illuminating system, and described backlight illuminating system realizes this direct-type backlight LED lens of secondary light-distribution, it is characterized in that, described lens are the lens described in one of claim 1 to 7.
10. a panel light, comprises backlight illuminating system, and described backlight illuminating system comprises the direct-type backlight LED lens realizing secondary light-distribution, it is characterized in that, described lens are the lens described in one of claim 1 to 7.
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| CN201520106979.0U CN204437994U (en) | 2015-02-14 | 2015-02-14 | A kind of Novel LED backlight illumination light-distribution lens |
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| CN201520106979.0U CN204437994U (en) | 2015-02-14 | 2015-02-14 | A kind of Novel LED backlight illumination light-distribution lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106547145A (en) * | 2015-09-18 | 2017-03-29 | 群创光电股份有限公司 | Backlight module and display device |
| CN106989357A (en) * | 2016-01-21 | 2017-07-28 | 恩普乐股份有限公司 | Flux control member, light-emitting device, planar light source device and display device |
-
2015
- 2015-02-14 CN CN201520106979.0U patent/CN204437994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106547145A (en) * | 2015-09-18 | 2017-03-29 | 群创光电股份有限公司 | Backlight module and display device |
| CN106989357A (en) * | 2016-01-21 | 2017-07-28 | 恩普乐股份有限公司 | Flux control member, light-emitting device, planar light source device and display device |
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