CN103925557A - Uniform light lens and LED light source module with same - Google Patents
Uniform light lens and LED light source module with same Download PDFInfo
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- CN103925557A CN103925557A CN201410117760.0A CN201410117760A CN103925557A CN 103925557 A CN103925557 A CN 103925557A CN 201410117760 A CN201410117760 A CN 201410117760A CN 103925557 A CN103925557 A CN 103925557A
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Abstract
The invention discloses a uniform light lens which is a rotator and comprises a top emergent plane, side emergent planes, an incident plane and a bottom plane. The top emergent plane and the incident plane are of concave structures which are symmetrical along a rotational symmetry axis of the uniform light lens; the top emergent plane comprises an extension curve and a parabola on the section of the rotational symmetry axis; the side emergent planes comprise straight line sections and arc sections; the incident plane comprises top arc-shaped curves, first trapezoidal curves, second trapezoidal curves and lateral curves which are sequentially connected with one another. The uniform light lens has the advantages that the uniform light lens is exquisite in structure, and a uniform illumination effect can be realized under the conditions of ultra-short light mixing distances and ultra-far light source distances.
Description
Technical field
The present invention relates to optical design field, particularly a kind of even optical lens and comprise the LED light source module of this even optical lens.
Background technology
LED is because of features such as it are energy-conservation, colour gamut is wide, the life-span is long, governing speed is fast, and more traditional type fluorescent light that compacts, has shown huge advantage gradually.In LED-backlit illumination mainstream technology route, there are two kinds of mainstream technology routes of side entering type and straight-down negative.Compare side entering type (LED is arranged on the side of viewing area), the Core Superiority of straight-down negative technology (LED is placed on display bottom) comprising: light source heat radiation area is large, is convenient to heat radiation, and reliability is high; Be easy to control local regional luminance, contrast and dynamic characteristic are better; The light loss of straight-down negative light path still less; Save LGP, cost backlight reduces greatly.
Yet, based on light source cost consideration, need to strengthen direct-type backlight space between light sources as far as possible and reduce light source usage quantity; Meanwhile, compare side entering type technology, direct-type backlight specification requirement has larger light mixing distance, thereby causes television receiver body thicker.Therefore, how at the light source of large spacing, arranging in situation, to light source design optical system, make to complete Uniform Illumination design with the thinnest thickness, is a major challenge of direct-type backlight technology.
For direct-type backlight optical design technology, in prior art, CN202521495U and US8348475 realize by the positive camber cooperation incident curved surface of similar shape of a saddle shape, can form circular light spot comparatively uniformly, but this technology can only meet the backlight product application of the above light mixing distance of 25mm (being that light source luminescent face is to the distance of display screen), space between light sources 80mm left and right substantially, can be used at present in 25mm thickness backlight technology.If but fuselage light mixing distance is reduced to 15mm, spot radius will dwindle nearly one times, if reach the needed quantity of light source of identical uniformity level, will increase by 3 times, can not meet ultra-thin direct-type backlight designing requirement.
Summary of the invention
The object of the invention is to: a kind of even optical lens that is applicable to the backlight product that space between light sources is large and light mixing distance is short is provided.
In order to solve the problems of the technologies described above, the invention provides a kind of even optical lens, described even optical lens is revolving body, comprise top exit facet, sidepiece exit facet, the plane of incidence and baseplane, described top exit facet and the described plane of incidence are along the inner concave shape structure of the Rotational Symmetry axial symmetry of even optical lens; On the cross section of rotation axes of symmetry,
Described top exit facet comprises extension curve and parabola;
Described sidepiece exit facet comprises straightway and arc;
The described plane of incidence comprises top arc curve, the first step curve, the second step curve and the side direction curve connecting successively.
The starting point of described extension curve is positioned on described rotation axes of symmetry, and slope is herein maximum, the end of described extension curve and described parabola intersect, and slope is minimum herein.
The starting slope of described extension curve is greater than 1.
The straightway of described sidepiece exit facet and the distance between rotation axes of symmetry become greatly gradually along top-down direction, and the distance between described arc and rotation axes of symmetry becomes large gradually along top-down direction.
The curve that described top arc curve increases respectively gradually for mild two sideleads in middle part.
The slope edge of described the first step curve reduces gradually away from described Rotational Symmetry direction of principal axis, and in smoothing junction with top arc curve and the second step curve respectively.
Described the second step curve is smoothed curve.
Described side direction curve comprises straightway and the curved section that outwards expansion and slope reduce gradually gradually.
The scope of the crossing angle of described side direction curve and described the second step curve is that 90 degree are to 95 degree.
Ban Jing≤the 0.1mm that connects the transition chamfering of described the second step curve and described side direction curve.
The material of described even optical lens is PMMA or PC resin.
Described baseplane is frosting.
The parabola of described top exit facet is connected with the straightway of described sidepiece exit facet, and the upper area of described straightway is frosting, the Gao Du≤0.5mm of described frosting.
Another object of the present invention is: a kind of LED light source module that comprises above-mentioned even optical lens is provided, also comprises reflecting paper and substrate, described reflecting paper is adhered on described substrate; Described LED light source is SMD light source, and the exiting surface of LED light source is circular flat, and described exiting surface flushes with the baseplane of even optical lens; Described LED light source is arranged on described substrate, and the baseplane of even optical lens is provided with a plurality of fixing feet, and described a plurality of fixing feet are by sticky stuff and described substrate bonding.
Described LED light source and even optical lens are a plurality of, according to array arrangement, are placed on described substrate, form large area lighting.
The baseplane of described even optical lens adopts the structure of plane formula thickening, and it thickens the thickness that highly equals LED light source.
The described plane of incidence is coated with anti-reflection film.
With respect to prior art, the present invention has following beneficial effect:
1, the structure of even optical lens of the present invention is meticulous, can the in the situation that of ultra-thin light mixing distance, super large space between light sources, realize Uniform Illumination.Wherein, top exit facet is provided with one section and extends curve and one section of parabolic curve, and the light respectively LED being sent forms total reflection to two different directions, has at utmost guaranteed the uniformity of spot size and colourity, illumination.
2, the baseplane of even optical lens of the present invention is frosting, thus guarantee the light reflect from even optical lens inner chamber no longer vertical sand shooting to screen, form bright spot.
3, the parabolical upper area of stating of the top exit facet of even optical lens of the present invention is frosting, and the light that imports center is evenly scattered, and can avoid screen to occur bright line near LED centre of luminescence local location.
4, even optical lens body of the present invention only needs upper and lower parting, and easy to process, processing cost is low; The project organization of the even optical lens of the present invention comprises that discontinuous construction, frosted arrange etc., can both guarantee that back-off does not appear in curved surface, makes mould only need upper and lower two moulds, and mould structure is very simple, and processing cost is low.
5, the adopting surface mounted LED light source that even optical lens of the present invention can be to dissimilar luminous intensity distribution, accurately realizes uniform-illumination and distributes, and is widely used.
6, lens yardstick is moderate, has not only guaranteed design accuracy but also avoided the excessive actual light mixing distance causing of lens significantly to reduce.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the embodiment of the present invention one;
Fig. 2 is the cutaway view of the embodiment of the present invention one;
Fig. 3 is the light schematic diagram of the embodiment of the present invention one;
Fig. 4 is one of the embodiment of the present invention two light schematic diagrames;
Fig. 5 be inventive embodiments two light schematic diagram two;
Fig. 6 is one of light schematic diagram of the embodiment of the present invention three;
Fig. 7 be the embodiment of the present invention three light schematic diagram two;
Fig. 8 is the schematic diagram of the embodiment of the present invention four;
Fig. 9 is the schematic diagram that the embodiment of the present invention four comprises a plurality of light source modules;
Figure 10 is the simulation Illumination Distribution figure of the embodiment of the present invention four;
Figure 11 is the schematic diagram of the embodiment of the present invention five.
The specific embodiment
Embodiment mono-
Referring to Fig. 1-3.A kind of even optical lens, described even optical lens is revolving body, comprise top exit facet 12, sidepiece exit facet 13, the plane of incidence 14 and baseplane 15, described top exit facet 12 and the described plane of incidence 14 are along the inner concave shape structure of rotation axes of symmetry 21 symmetries of even optical lens; On the cross section of rotation axes of symmetry 21,
Described top exit facet 12 comprises extension curve 221 and parabola 222;
Described sidepiece exit facet 13 comprises straightway 231 and arc 232;
The described plane of incidence 14 comprises top arc curve 241, the first step curve 242, the second step curve 243 and the side direction curve 244 connecting successively.
In order to explain more intuitively the structure of even optical lens, from cross section, adopt " line " to describe top exit facet, sidepiece exit facet, the plane of incidence; Curved surface in described " line " in fact corresponding stereogram.
21 of described extension curve 221(spinning symmetry axis stretch out) starting point be positioned on described rotation axes of symmetry 21, slope is herein maximum, the end of described extension curve 221 intersects with described parabola 222, herein slope minimum.
The parabola 222 of described top exit facet is connected with the straightway 231 of described sidepiece exit facet.
The starting slope of described extension curve 221 is greater than 1.
Distance between described straightway 231 and rotation axes of symmetry 21 becomes greatly gradually along top-down direction, and the distance between described arc 232 and rotation axes of symmetry 21 becomes large gradually along top-down direction.
Described top arc curve 241 is mild near the middle part of rotation axes of symmetry 21, and after about 0.3mm, slope increases gradually.The light path of this part is: the light 302 emitting from LED light source 301, after 241 incidents of top arc curve, again after extension curve 221 total reflections of top exit facet 12, then from straightway 231 outgoing of sidepiece exit facet 13, the light after outgoing becomes the outgoing of 60-75 degree direction with optical axis.The effect of this part is extension curve 221 total reflections through top exit facet 12 by the less light of LED light source 301 and the angle of optical axis, then passes through straightway 231 outgoing of sidepiece exit facet 13, forms the light 302 of direct directive screen.
The slope of described the first step curve 242 is along reducing gradually away from described rotation axes of symmetry 21 directions, respectively with top arc curve 241 and the second step curve 243 smooth connections.The light path of this part is: the light 303 emitting from LED light source 301, after the first step curve 242 incidents, then through parabola 222 total reflections of top exit facet 12, then from straightway 231 outgoing of sidepiece exit facet 13; In the light 303 of final outgoing, have half (part) 3031 direct directive screen, second half (part) 3032 directive reflecting paper, project screen through reflecting paper reflection.Directly the light 3031 of directive screen and the light of directive reflecting paper 3032 are 70 degree to 90 degree with optical axis included angle.This part light has formed the main light of maximum angle, and for light mixing distance 15mm light mixing distance, the interval covering on screen is mainly the region that radius is greater than 60mm.
Described the second step curve 243 is smoothed curve.The light path of this part is: the light 304 emitting from LED light source 301, after the second step curve 243 incidents, again through parabola 222 total reflections of top exit facet 12, then from straightway 231 outgoing of sidepiece exit facet 13, light and the angle between optical axis after outgoing are less than 75 degree, then project screen through reflecting paper reflection.This part light almost will all be mapped to reflecting paper back reflection to screen, and its interval radius covering on screen is less than light 303.
Described side direction curve 244 comprises straightway and the curved section that outwards expansion and slope reduce gradually gradually.
Described side direction curve 244 is that 90 degree are to 95 degree with the crossing angle of described the second step curve 243.Preferably, the Ban Jing≤0.1mm that is connected chamfering between described side direction curve 244 and described the second step curve 243.The light path of this part is: the light 305 emitting from LED light source 301, after 244 incidents of side direction curve, then, from arc 232 outgoing of sidepiece exit facet 13, then projects screen.This part angle of incidence of light degree is between 65-75 degree, the light mixing distance for 15mm, and the interval covering on screen is mainly that radius is greater than the region that 40mm is less than 70mm.
The material of described even optical lens is PMMA or PC resin.
All curved surfaces of the even optical lens of the present embodiment all only need upper and lower mould depanning, and mould is simple, and die cost and processing cost are lower.
Embodiment bis-
Referring to Fig. 4-5.Embodiment bis-is with the difference of embodiment mono-: described baseplane 15 is frosting.
It should be noted that, in whole design, do not have light directly to arrive the position in close axle center without peripheral reflection paper, this is because in the minimum situation of light mixing distance, center brightness value will be reduced to below 10% of original situation, and the form of any direct incident all may occur bright spot.And in the design, even if be not originally directly mapped to the design at center, because mismachining tolerance and light source luminescent attribute off-design value also very likely cause center illumination apparently higher than the problem that forms bright spot around.
Find after deliberation, on side direction curve 244, the backward lower angle of the light refraction of submarginal position is minimum, and this part light is very easy to form compare Gao center illumination after substrate reflection.Referring to Fig. 4, the light 401 emitting from LED light source 301, submarginal position incident on side direction curve 244, then penetrates through sidepiece exit facet 13, because the form of Fresnel loss has part light reflection to return lens.This part light will be mapped to lens bottom, outgoing after reflecting paper or substrate reflection again after ejaculation lens.Because the diffuse-reflecting power of reflecting paper or substrate is lower, and this part light can form straight line light 402 in minute surface direction just; And because light mixing distance is very little, only need the such direct projection light 402 of small part, will cause and receive very high center brightness on screen.
In the present embodiment, referring to Fig. 5, by lens bottom, be that baseplane 15 all arranges frosted structure, the light 401 that makes originally may to form smaller angle outgoing is because the frosted structure of bottom causes light disperse 403, form divergent rays 404 to all directions outgoing, prevented that this part light is directly mapped to low-angle by paracentral position.
Embodiment tri-
Referring to Fig. 6-7.Embodiment tri-is with the difference of embodiment mono-: the upper area 502 of the straightway 231 of described sidepiece exit facet 13 is frosting, the Gao Du≤0.5mm of described frosting.
Referring to Fig. 6, due to the cause of mismachining tolerance and light source luminescent attribute off-design value, the light 501 emitting from LED light source 301, submarginal position incident on the second step curve 243, through parabola 222 reflections, then the straightway of sidepiece exit facet 13 penetrates 231 outgoing; The angle that arrives reflecting paper due to the downward outgoing of light 501 is very little, very easily occurs the problem improving with the brightness of compare Jin position, center after reflecting paper reflection.Through research, find, this part light 501 all concentrates on the upper area 502 of the parabola 222 of top exit facet 222, and it is highly generally no more than 0.5mm.Referring to Fig. 7, this upper area 502 is carried out after frosted processing, light 501 disperses of smaller angle outgoing are the light 503 of a plurality of angle outgoing originally, and the light energy that arrives center is reduced.
Embodiment tetra-
Referring to Fig. 8-10.The present embodiment is the LED light source module that comprises even optical lens, also comprises reflecting paper (not shown) and substrate 603, and described reflecting paper is adhered on described substrate 603; Described LED light source 601 is SMD light source, and the exiting surface 6011 of LED light source 601 is circular flat, and described exiting surface 6011 flushes with the baseplane 15 of even optical lens; Described LED light source 601 is arranged on described substrate 603, and the baseplane 15 of even optical lens is provided with a plurality of fixing feet 602, and described a plurality of fixing feet 602 are bonding by sticky stuff and described substrate 603.
Described adopting surface mounted LED light source 601 is of a size of 3.5 * 2.8mm.
Described LED light source 601 and even optical lens are a plurality of, according to array arrangement, are placed on described substrate 603, form large area lighting.
In the present embodiment, the distance between receiver 604 backlight and described exiting surface 6011 is 15mm.
Figure 10 is the optical analog result of the present embodiment.It is the reflecting paper backlight of high reflectance that reflecting layer is set, and reflectivity is 80-90%.Simulate effect is visible, the in the situation that of 15mm light mixing distance, can be at radius 80mm with interior formation uniform illuminance, and the light source interval that is applied to back lighting has greatly reduced quantity of light source and has saved cost more than can reaching 80mm.
Embodiment five
Referring to Figure 11.Embodiment five is from the different supports of embodiment mono-: the baseplane 15 of even optical lens adopts the structure 702 of plane formula thickening, and it thickens the thickness that highly equals LED light source 701; And carry out frosted processing in the bottom 703 of the structure 702 of thickening.
Preferably, for avoiding center illumination too high, the described plane of incidence 14 is coated with anti-reflection film.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned embodiment.Therefore, the present invention is not limited to the specific embodiment disclosed and described above, to modifications and changes more of the present invention, also should fall in the protection domain of claim of the present invention.In addition,, although used some specific term and nouns of locality in this description, these terms and the noun of locality just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. even optical lens, described even optical lens is revolving body, it is characterized in that: comprise top exit facet, sidepiece exit facet, the plane of incidence and baseplane, described top exit facet and the described plane of incidence are along the inner concave shape structure of the Rotational Symmetry axial symmetry of even optical lens; On the cross section of rotation axes of symmetry,
Described top exit facet comprises extension curve and parabola;
Described sidepiece exit facet comprises straightway and arc;
The described plane of incidence comprises top arc curve, the first step curve, the second step curve and the side direction curve connecting successively.
2. even optical lens according to claim 1, is characterized in that: described baseplane is frosting.
3. even optical lens according to claim 2, is characterized in that: described parabola is connected with described straightway, and the upper area of described straightway is frosting, the Gao Du≤0.5mm of described frosting.
4. even optical lens according to claim 1, is characterized in that: the starting point of described extension curve is positioned on described rotation axes of symmetry, and slope is herein maximum, the end of described extension curve and described parabola intersect, and slope is minimum herein; The starting slope that extends curve is greater than 1.
5. even optical lens according to claim 1, it is characterized in that: the distance between described straightway and rotation axes of symmetry becomes greatly gradually along top-down direction, and the distance between described arc and rotation axes of symmetry becomes large gradually along top-down direction.
6. even optical lens according to claim 1, it is characterized in that: the curve that described top arc curve increases respectively gradually for mild two sideleads in middle part, the slope of described the first step curve is along reducing gradually away from described Rotational Symmetry direction of principal axis, and in smoothing junction with described top arc curve and described the second step curve respectively, described the second step curve is smoothed curve, and described side direction curve comprises straightway and the curved section that outwards expansion and slope reduce gradually gradually.
7. even optical lens according to claim 6, it is characterized in that: the scope of the crossing angle of described side direction curve and described the second step curve be 90 degree to 95 degree, connect the half footpath≤0.1mm of the transition chamfering of described the second step curve and described side direction curve.
8. even optical lens according to claim 1, is characterized in that: the described plane of incidence is coated with anti-reflection film.
9. the LED light source module that comprises even optical lens described in claim 1-8 any one, is characterized in that: also comprise reflecting paper and substrate, described reflecting paper is adhered on described substrate; Described LED light source is SMD light source, and the exiting surface of LED light source is circular flat, and described exiting surface flushes with the baseplane of even optical lens, and described LED light source is arranged on described substrate; The baseplane of even optical lens is provided with a plurality of fixing feet, and described a plurality of fixing feet are by sticky stuff and described substrate bonding.
10. LED light source module according to claim 9, is characterized in that: the baseplane of described even optical lens adopts the structure of plane formula thickening, and it thickens the thickness that highly equals LED light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117760.0A CN103925557B (en) | 2014-03-26 | 2014-03-26 | Even optical lens and include the LED light source module of this even optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117760.0A CN103925557B (en) | 2014-03-26 | 2014-03-26 | Even optical lens and include the LED light source module of this even optical lens |
Publications (2)
| Publication Number | Publication Date |
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| CN103925557A true CN103925557A (en) | 2014-07-16 |
| CN103925557B CN103925557B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410117760.0A Expired - Fee Related CN103925557B (en) | 2014-03-26 | 2014-03-26 | Even optical lens and include the LED light source module of this even optical lens |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017088100A1 (en) * | 2015-11-23 | 2017-06-01 | 成都派斯光学有限公司 | Short-range light mixer |
| CN108732823A (en) * | 2018-08-03 | 2018-11-02 | 广东烨嘉光电科技股份有限公司 | A kind of back light system of head-up display device |
| CN108826228A (en) * | 2018-06-27 | 2018-11-16 | 赛尔富电子有限公司 | A kind of illuminating lens and lighting unit and lighting system |
| CN110703367A (en) * | 2014-07-17 | 2020-01-17 | 首尔半导体（株） | Light diffusion lens and light emitting device |
| CN110966525A (en) * | 2019-12-20 | 2020-04-07 | 广东晶科电子股份有限公司 | Lens and light-emitting device |
| CN113805383A (en) * | 2021-08-27 | 2021-12-17 | 广东烨嘉光电科技股份有限公司 | Fidelity type backlight system for wide color gamut display and light distribution method thereof |
| US11655960B2 (en) | 2013-07-17 | 2023-05-23 | Seoul Semiconductor Co., Ltd. | Light diffusing lens and light emitting device including the same |
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| US20110305026A1 (en) * | 2010-06-14 | 2011-12-15 | Nittoh Kogaku K.K. | Light emitting device |
| CN103277739A (en) * | 2013-04-26 | 2013-09-04 | 易美芯光（北京）科技有限公司 | Optical lens |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11655960B2 (en) | 2013-07-17 | 2023-05-23 | Seoul Semiconductor Co., Ltd. | Light diffusing lens and light emitting device including the same |
| CN110703367A (en) * | 2014-07-17 | 2020-01-17 | 首尔半导体（株） | Light diffusion lens and light emitting device |
| CN110703367B (en) * | 2014-07-17 | 2021-12-31 | 首尔半导体（株） | Light diffusion lens and light emitting device |
| WO2017088100A1 (en) * | 2015-11-23 | 2017-06-01 | 成都派斯光学有限公司 | Short-range light mixer |
| CN108826228A (en) * | 2018-06-27 | 2018-11-16 | 赛尔富电子有限公司 | A kind of illuminating lens and lighting unit and lighting system |
| CN108732823A (en) * | 2018-08-03 | 2018-11-02 | 广东烨嘉光电科技股份有限公司 | A kind of back light system of head-up display device |
| CN108732823B (en) * | 2018-08-03 | 2023-08-08 | 广东烨嘉光电科技股份有限公司 | Backlight system of head-up display device |
| CN110966525A (en) * | 2019-12-20 | 2020-04-07 | 广东晶科电子股份有限公司 | Lens and light-emitting device |
| CN110966525B (en) * | 2019-12-20 | 2024-03-19 | 广东晶科电子股份有限公司 | Lens and light-emitting device |
| CN113805383A (en) * | 2021-08-27 | 2021-12-17 | 广东烨嘉光电科技股份有限公司 | Fidelity type backlight system for wide color gamut display and light distribution method thereof |
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|---|---|
| CN103925557B (en) | 2016-06-29 |
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