CN102654252B - Lens and illumination device - Google PatentsLens and illumination device Download PDF
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- CN102654252B CN102654252B CN201210024745.2A CN201210024745A CN102654252B CN 102654252 B CN102654252 B CN 102654252B CN 201210024745 A CN201210024745 A CN 201210024745A CN 102654252 B CN102654252 B CN 102654252B
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The present invention relates to lighting device, the semiconductor light-emitting elements particularly possessing LED (Light-Emitting Diode) etc. is used as light source, and mainly as the lighting device that the substitute of incandescent lamp uses.
In recent years, in order to prevent global warming from developing energy-saving, at lighting field, as the substitute of existing incandescent lamp, just carrying out the research of the lamp using LED, exploitation.This is because, compared with existing incandescent lamp, use the light fixture of LED to have high energy efficiency.When the purposes expansion considering the lamp using LED, require the socket utilizing existing incandescent lamp as former state, expect to use comparably with existing incandescent lamp.In addition, because incandescent lamp evenly penetrates light from the front of incandescent lamp to rear with cardinal principle dome shape ground, therefore for the lamp using LED, the irradiation of guiding the light equal with situation about being arranged on by incandescent lamp in ligthing paraphernalia is required.But, because the straightline propagation of its emergent light of LED is strong, therefore when using comparably with existing incandescent lamp, need do not expand light range of exposures (luminous intensity distribution) with having uneven luminance.
As an example of the means of the luminous intensity distribution of expansion light, as recorded in patent document 1, there is following method: at the outer surface configuration LED of the columned matrix of cardinal principle, and the cover of light transmission is set in the mode covering above-mentioned matrix and above-mentioned LED, thus expansion luminous intensity distribution.But, because matrix to be made as substantially cylindric and/or at columned matrix configuration LED substantially etc. by needs, thus likely make manufacturing process complicate.
Also the means using lens are had in the means of expansion luminous intensity distribution.As the prior art using lens to expand luminous intensity distribution, there is technology disclosed in patent document 2 and patent document 3.Patent Document 2 discloses: flux control member (lens) is set on the top of light-emitting component, the generation of uneven luminance is prevented, the shape of the lens of emergent light in the plane by arranging recess and air channel on the face relative with light-emitting component of flux control member.In addition, Patent Document 3 discloses: by there is bottom surface, reflecting surface, arrange thus the shape of the lens making light penetrate to side on the top of light-emitting component as the lens of the second plane of refraction of round and smooth surface extending relative to the first refractive face of the angle of the inclined of lens with from bottom surface to first refractive face.
Patent document 1: JP 2008-103112 publication
Patent document 2: JP 2009-211990 publication
Patent document 3: JP 2004-133391 publication
But, lens disclosed in patent document 2 make the light irradiated from light-emitting component expand equably on direction of illumination (front), the generation of uneven luminance can be prevented, but, almost not relative to the direction of illumination of light-emitting component to the light of side and rear outgoing.Therefore, use in the lighting device of lens patent document 2 is disclosed, the situation as using to the substitute of the incandescent lamp of side and rear emergent light cannot be applicable to.In addition, although lens disclosed in patent document 3 can to side surface direction emergent light, almost do not have forwards with the light of rear outgoing, therefore cannot be applicable to situation about using as the substitute of incandescent lamp.In addition, Figure 10 represents the state of the outgoing of light when patent document 2 and patent document 3 being combined simply.Because the light to side outgoing is more, forwards less with the exit dose of the light of rear outgoing, be therefore difficult to obtain needed for incandescent lamp substitute, make light with the effect of cardinal principle dome shape uniform.
Summary of the invention
The installation that the object of this invention is to provide LED is simple and prevent the uneven luminance of the outgoing of light and make light with the lens of cardinal principle dome shape uniform and the lighting device using these lens.
Lighting device of the present invention, there is substrate, be arranged on the illuminator of the top side of this substrate, with the lens covered above illuminator, it is characterized in that, lens have the face relative with the light-emitting area of illuminator, the face recessed with the inner side of the contrary lateral lenses in the face relative with the light-emitting area of illuminator, the mask be recessed into the inner side of lens has the function making to incide from the face relative with the light-emitting area of illuminator the light in lens and penetrate to the top of lens, with the function that side and the below to lens is reflected, the part in the face relative with the light-emitting area of illuminator is provided with recess, recess is following shape, namely, making to incide the light in lens from recess with the face that the inner side to lens is recessed into reflects penetrate many shapes than the top to lens to the side of lens and below.
Or, lighting device of the present invention, there are substrate, the illuminator arranged in the top side of this substrate and the lens covered above illuminator, it is characterized in that, the face that the inner side that lens have the face relative with the light-emitting area of illuminator and the contrary lateral lenses in the face relative with the light-emitting area of illuminator is recessed into, the mask be recessed into the inner side of lens has the inclination of heaving towards top and to the top of lens from the bottom in the face be recessed into the inner side of lens, the face relative with the light-emitting area of illuminator is provided with to the recessed recess in the inner side of lens.
Or, lens of the present invention, there is the face of the opposition side of the face that the inner side to these lens is recessed into and the face be recessed into the inner side of lens, the mask be recessed into the inner side of lens has the inclination of heaving towards top and to the top of these lens from the bottom in the face be recessed into the inner side of lens, the face of opposition side is provided with to the recessed recess in the inner side of these lens.
Or, lighting device of the present invention, there is substrate, the multiple semiconductor light-emitting elements arranged above this substrate, with the lens being located at surface in order to cover semiconductor light-emitting elements, it is characterized in that, lens comprise top, sidepiece and bottom, the lensed first surface of bottom tool, lensed second and the 3rd of sidepiece tool, the lensed fourth face of top tool and the 5th, the first surface hemispheric curved surface that side is recessed in lens, and be arranged to cover semiconductor light-emitting elements, one end of second is connected with the end of first surface, second face is the curved surface of the sidepiece covering first surface, one end of 3rd is connected with the other end of second, one end of fourth face is connected with the other end of the 3rd, the fourth face curved surface that side is recessed in lens, 5th is connected with the other end of fourth face, it is the face relative to substrate general parallel orientation, light from semiconductor light-emitting elements is incident in lens from first surface, from the light after first surface incidence towards second, 3rd, fourth face, 5th, second face makes the top from the light after first surface incidence towards lighting device reflect and penetrate from lens, 3rd face to make from the light after first surface incidence towards fourth face at intralens reflection, the side from the light after fourth face reflection towards lighting device and below is made to reflect and penetrate from lens, fourth face makes from the light after first surface incidence towards the 3rd ground at intralens reflection, make the top refraction from the light after the 3rd reflection towards lighting device and penetrate from lens, 5th face is penetrated from lens with making the top from the light after first surface incidence towards lighting device, be provided with the recess that side is recessed in lens on the first face, light after from from semiconductor light-emitting elements to recess incidence towards fourth face than towards more than the 5th.
The effect of invention is as follows.
According to the present invention, there is substrate, be arranged on the illuminator of the top side of this substrate, with in the lighting device of the lens covered above illuminator, lens have the face relative with the light-emitting area of illuminator, the face recessed with the inner side of the contrary lateral lenses in the face relative with the light-emitting area of illuminator, the mask be recessed into the inner side of lens has the function making to incide from the face relative with the light-emitting area of illuminator the light in lens and penetrate to the top of lens, with the function that side and the below to lens is reflected, the part in the face relative with the light-emitting area of illuminator is provided with recess, recess makes to incide the light in lens from recess with the face that the inner side to lens is recessed into reflect penetrate many shapes than the top to lens to the side of lens and below, therefore, the installation that can realize LED is simple and prevent uneven luminance and make the lighting device that light evenly penetrates with cardinal principle dome shape.
Or, according to the present invention, there is substrate, at the illuminator that the top side of this substrate is arranged, with in the lighting device of the lens covered above illuminator, lens have the face relative with the light-emitting area of illuminator, the face recessed with the inner side of the contrary lateral lenses in the face relative with the light-emitting area of illuminator, the mask be recessed into the inner side of lens has the inclination of heaving towards top and to the top of lens from the bottom in the face be recessed into the inner side of lens, the face relative with the light-emitting area of illuminator is provided with to the recessed recess in the inner side of lens, therefore, the installation that can realize LED is simple and prevent uneven luminance and make the lighting device that light evenly penetrates with cardinal principle dome shape.
Or, according to lens of the present invention, these lens have the face of the opposition side of the face that the inner side to these lens is recessed into and the face be recessed into the inner side of lens, the mask be recessed into the inner side of lens has the inclination of heaving towards top and to the top of these lens from the bottom in the face be recessed into the inner side of lens, the face of opposition side is provided with to the recessed recess in the inner side of these lens, therefore, the installation that can realize LED is simple and prevent uneven luminance and make the lens that light evenly penetrates with cardinal principle dome shape.
Or, according to the present invention, there is substrate, the multiple semiconductor light-emitting elements arranged above this substrate, with be located in the lighting device of the lens of surface to cover semiconductor light-emitting elements, lens comprise top, sidepiece and bottom, the lensed first surface of bottom tool, lensed second and the 3rd of sidepiece tool, the lensed fourth face of top tool and the 5th, the first surface hemispheric curved surface that side is recessed in lens, and be arranged to cover semiconductor light-emitting elements, one end of second is connected with the end of first surface, second face is the curved surface of the sidepiece covering first surface, one end of 3rd is connected with the other end of second, one end of fourth face is connected with the other end of the 3rd, the fourth face curved surface that side is recessed in lens, 5th is connected with the other end of fourth face, it is the face relative to substrate general parallel orientation, light from semiconductor light-emitting elements is incident in lens from first surface, from the light after first surface incidence towards second, 3rd, fourth face, 5th, second face makes the top from the light after first surface incidence towards lighting device reflect and penetrate from lens, 3rd face to make from the light after first surface incidence towards fourth face at intralens reflection, the side from the light after fourth face reflection towards lighting device and below is made to reflect and penetrate from lens, fourth face makes from the light after first surface incidence towards the 3rd ground at intralens reflection, make the top refraction from the light after the 3rd reflection towards lighting device and penetrate from lens, 5th face is penetrated from lens with making the top from the light after first surface incidence towards lighting device, be provided with the recess that side is recessed in lens on the first face, light after from from semiconductor light-emitting elements to recess incidence towards fourth face than towards more than the 5th, therefore, the installation that can realize LED is simple and prevent uneven luminance and make the lighting device that light evenly penetrates with cardinal principle dome shape.
Accompanying drawing explanation
Fig. 1 (a) is the sectional view observed from the side of the illuminating part of embodiments of the invention 1, and (b) is the isometrical drawing of the lens of embodiments of the invention 1.
Fig. 2 is the figure of the situation of the light representing embodiments of the invention 1.
In Fig. 3, figure (a) be the occasion of installation at the lens changing the embodiment of the present invention 1, the sectional view observed from the side of illuminating part, scheme the isometrical drawing that (b) is the lens of Fig. 3 (a).
In Fig. 4, figure (a) be the occasion of installation at the lens changing the embodiment of the present invention 1, the sectional view observed from the side of illuminating part, scheme the isometrical drawing that (b) is the lens of Fig. 4 (a).
Fig. 5 is the sectional view observed from the side when embodiments of the invention 1 being used as incandescent lamp.
Fig. 6 is the sectional view observed from the side of the illuminating part of embodiments of the invention 2.
In Fig. 7, figure (a) is the sectional view observed from the illuminating part of embodiments of the invention 3, and figure (b) is the isometrical drawing of the lens of Fig. 7 (a).
Fig. 8 is the sectional view observed from the side when embodiments of the invention 4 being used as incandescent lamp.
Fig. 9 is the sectional view observed from the side when embodiments of the invention 5 being used as incandescent lamp.
Figure 10 is the sectional view of the lens of conventional example.
1-lens, 2-LED module, 3-light-emitting area (fluorescence dignity), 4-substrate, 5-optical axis, 6-grappling fixture portion, 7-extension, 10, 151-framework, 11-circuit, 12-lamp holder, 13, 50-covers, 20-lens pressing plate, 21-screw, 100-comprises the lens of installation portion, other forms of 150-substrate, 200-comprises other forms of the lens of installation portion, 300, 400, other forms of 500-lens, 501-light, the lens of 600-conventional example, a-par, the concave surface of b-funnel type, c-plane of refraction, the curved surface of d-bowl-type, e-curved surface, the cone shape recess of f-, the concave surface of g-Fuji type, h-many cone shape recesses.
Detailed description of the invention
In the lighting device that the present invention relates to; it is characterized in that; at least one illuminator is set on one substrate; have and protect illuminator and the cover with light transmission; above the light-emitting area of illuminator and cover inside there are lens; in lens, there are following lens: have cone shape recess substantially at the general center of the opposite face relative with light-emitting area, the size of recess bottom surface is less than the area of light-emitting area.
As other examples, be characterised in that, the opposite face of light-emitting area is curved surface, has the recess of funnel type in the opposition side of opposite face.In addition, as other examples, be characterised in that, in the recess bottom surface of above-mentioned funnel type, there are the lens possessing par.Said lens is formed with the cone shape recess of cardinal principle with the bottom surface less than light-emitting area at the opposite face of light-emitting area, thus suppresses the uneven luminance of the light to cover surface outgoing.In addition, the light of the recess increase rearward outgoing of the funnel type formed in the opposition side of light-emitting area.In addition, by par is made in the bottom surface of funnel type recess, thus the light of forwards outgoing is increased.By combining these effects, thus the lens to cover uniformly emergent light can be obtained.In addition, by making cover have scattering properties, thus the uniformity of light can also be increased.In addition, in the lighting device that the present invention relates to, when the alternative purposes being considered as incandescent lamp uses, expect that there is the shape similar with bulb.As the example implemented, there is following structure: use LED module as illuminator, there is in the rear side of the substrate loading LED module the framework of cavity, there is the lamp holder for being connected with the socket of incandescent lamp in the past.In addition, in the cavity portion of framework, storage is used for the circuit of driving LED module.
Below, use accompanying drawing that embodiment 1 to 5 is described.As basic comprising, be provided with the LED module 2 as illuminator in a face of matrix 4.Below, in embodiment 1 to 5, using substrate 4 be benchmark by being provided with the direction in a face of LED module 2 as front (top), using the direction of another side as rear (below).Using the direction beyond front and below as side.When being set to spheroid side and lamp holder side in the bulb, spheroid side is top, and lamp holder side is below.
In the present embodiment, illustrate and prevent uneven luminance and the example of the lens that luminous intensity distribution is expanded.
Fig. 1 (a) is the sectional view observed from the side of the illuminating part of embodiments of the invention 1.LED module 2 is loaded in a face of substrate 4, the light-emitting area 3 of LED module 2 towards as with the rightabout front of substrate 4 (top).In addition, the major part that lens 1 are arranged to by lens 1 is positioned at the front (top) of the light-emitting area 3 of (く Ru) LED module 2.Substrate 4 is the parts for loading LED module 2.Supply electric power from circuit to LED module 2, light is irradiated in the front (top) from light-emitting area 3 to LED module 2.The light irradiated from light-emitting area 3 is incident to lens 1.
Lens 1 are arranged to cover LED module 2.In the present embodiment, lens 1 comprise par a (the 5th face), concave surface b (fourth face), plane of refraction c (the 3rd face), curved surface d (the second face), curved surface e (first surface), recess f and grappling fixture (get つ and hang か り) portion 6.In lens 1, curved surface e is the face relative with LED module 2.LED module 2 is surrounded by curved surface e and substrate 4.Curved surface e makes and covers that to be configured in as the LED module 2 on a face of the substrate 4 of plane hemispherical.Curved surface e is formed cone shape recess f.If representational light is as optical axis 5 in the light irradiate the light-emitting area 3 from LED module 2, then the part intersected at optical axis 5 and curved surface e is formed with recess f.In curved surface e, using from substrate 4 position farthest as curved face part e1.In the present embodiment, because optical axis 5 is by curved face part e1, therefore recess f is located at curved face part e1.Recess f is arranged to be recessed into the inner side of lens 1.Recess f is cone shape recess.From the light of the light-emitting area 3 of LED module 2 towards curved surface e and recess f, incide in lens 1 from curved surface e and recess f.The exit facet of the light of lens 1 comprises par a, concave surface b, plane of refraction c and curved surface d.Par a and concave surface b is positioned at the top of lens 1, and plane of refraction c and curved surface d is positioned at the sidepiece of lens 1.Concave surface b has the part that is connected with plane of refraction c from par a towards concave surface b and top to lens bloats such inclination.Funnel type is substantially formed by par a, concave surface b and plane of refraction c.Plane of refraction c is positioned at the scope from the side of concave surface b to rear.Par a is provided with in the bottom surface surrounded by concave surface b.Concave surface b has the function penetrated as the Transmission light reflected by plane of refraction c to the function and making in face of the direction reflection being positioned at the side of lens 1 and rear plane of refraction c by the light incided from curved surface e and recess f in lens 1 and to the front of lens 1.Par a has to be made to incide the function of the light in lens 1 to the transmission of lighting device front from curved surface e and recess f.Utilize par a to increase the exit dose of light to lighting device front.In addition, plane of refraction c has and makes the anaclasis after being reflected by concave surface b and the function that reflects to concave surface b direction from the light after curved surface e incidence of the function penetrated to the side of lighting device and rear from lens 1 and making.Curved surface d has to be made to incide the anaclasis in lens 1 and the function penetrated from lens 1 from curved surface e.From the light of curved surface d penetrating in the sideways scope in the front of lighting device.By forming cone shape recess f at curved surface e, can increase according to the amount to the light of concave surface b.By increasing according to the amount of the light of concave surface b, thus can increase the volume reflection of the light from concave surface b, therefore can to the front of bulb, side, rear irradiation light, can uneven luminance be prevented.Reflected by concave surface b from the light after recess f incidence, compared with the situation of curved surface e is only set, the outgoing from the rearward light in the side of lighting device can be increased.By increasing light from the rearward outgoing in the side of lighting device, thus there is the function of the uneven luminance reducing lighting device entirety.
Optical axis 5 and cone shape recess f angulation θ 1, when considering illumination to concave surface b, expect to be 10 ~ 50 ° of front and back.Such as, when the angle of θ 1 is 48 °, expect that the length making par a is 0.6mm, make the size of concave surface b for become the elliptical shape of radius 6mm × 12mm 1/4 arc.But if the size of the angle of θ 1 and par a changes, then the size of concave surface b also changes.In addition, when the opening portion of the recess f by curved surface e is called the bottom surface of cone shape recess f, the size X of the bottom surface of recess f is expected 1than the size X of light-emitting area 3 2little.Owing to becoming X 1< X 2, so the light reflected by concave surface b via recess f and the two kinds of light reflected by concave surface b via curved surface e can be produced, thus expand rearward emergent light from the side while uneven luminance can be prevented.X 1and X 2size ratio consideration illumination be preferably before and after 1: 2 to during concave surface b.Such as, at X 1during for 3.4mm, X 2size preferably about 8mm.In addition, when the angle of θ 1 is 48 °, preferably as follows: the length of par a is 0.6mm, the size of recess b is the arc of 1/4 of the elliptical shape becoming radius 6 × 12mm, recess b and plane of refraction c angulation are 55 °, and the vertical bottom face of curved surface d and curved surface e is 1mm, and curved surface d is the arc of a part for the elliptical shape of radius 9mm × 12mm, curved surface e is the arc of a part for the elliptical shape of radius 3mm × 8mm, and the thickness of lens 1 central part is 0.5mm.But if the curvature of adjustment concave surface b, and adjusting the rearward exit dose of light, then also can be other ratio.
The profile of lens 1 becomes cardinal principle funnel type and the shape that combines in the mode faced by the little part of respective area of bowl-type (bowl-type) substantially.When observing lens 1 from the side, be roughly hourglass shape.Substantially the circumferential lateral surface of funnel type is said plane of refraction c in the present embodiment, and the inner circumferential side of funnel type is said concave surface b in the present embodiment substantially.The part of being enclosed by the inner circumferential side bread of cardinal principle funnel type is said bottom surface a in the present embodiment.The circumferential lateral surface of bowl-type is said curved surface d in the present embodiment substantially, and the inner circumferential side of the frustum of a cone of bowl-type is said curved surface e in the present embodiment substantially.In a part of curved surface e, recess is set.The recess arranged in a part of curved surface e is said recess f in the present embodiment.In the present embodiment, the shape of recess f is coniform.One end of curved surface d is connected with the end of curved surface e, and one end of plane of refraction c is connected with the other end of curved surface d.One end of concave surface b is connected with the other end of plane of refraction c, and bottom surface a is connected with the other end of concave surface b.In the present embodiment, show funnel type, bowl-type substantially, but be not limited to this.If realize the shape of the function in each face, then the profile of lens 1 does not limit.
Lens 1 are arranged to cover LED module 2 by curved surface e.Light from the light-emitting area 3 of LED module 2 incides curved surface e and recess f.The light inciding curved surface e reflects according to the curvature of curved surface e and the refractive index of lens 1.Light from the strong LED module 2 of straightline propagation expands luminous intensity distribution forwards by curved surface e.In addition, the light inciding recess f also reflects.Tabular surface a, curved surface b, plane of refraction c and curved surface d is arrived by the light after curved surface e.Curved surface b is arrived by the light after recess f.The light arrived after tabular surface a forwards penetrates.The a part of light arrived in the light after curved surface b forwards penetrates from curved surface b, and other light is again to lens 1 internal reflection.The light arriving plane of refraction c and curved surface d from curved surface e and concave surface b reflects, forwards with side and rear injection.Curved surface e is to make the luminous intensity distribution expansion from the light of LED module 2 arrange.Recess b is in order to make light forwards transmission or arrange in lens 1 internal reflection.Tabular surface a is arranged to the front transmission of lens 1 to make light.Plane of refraction c is arranged towards the side of lens 1 and rear to make light.Curved surface d is arranged with side toward the front in order to make light.
Lens 1 can use a large amount of known technologies such as lathe, injection-molded shaping, light chisel and casting to manufacture.Lens 1 are by polymethyl methacrylate (PMMA, common name propylene) or Merlon (PC, common name Port リ カ).But, as long as translucent material, be not limited to these materials, but, from the viewpoint of the material that the loss of the light in energy-conservation preferably lens is little.In addition, can also multiple material be used, or also can have scattering properties by the particulate of about the 1000nm size be made up of polymethyl methacrylate and/or Merlon etc. in lens 1 internal mix.Make lens 1 have scattering properties, although thus the loss of light increase because of scattering, can have evenly the few light of uneven luminance.
The refractive index of lens 1 be contemplated to be that common transparent component has about 1.54, but according to the material used, the refractive index more high or low than it can also be had.Refraction and/or the reflection angle of the light in lens 1 depend on refractive index, so the refractive index of material used according to lens 1, need the change of shape.
Fig. 1 (b) represents the isometrical drawing of lens 1.As an example of the means be arranged on by lens 1 on substrate 4, illustrate the hole having at least two places on substrate 4, at the installation method that the columned part formation grappling fixture portion 6 extended from lens 1 bottom surface prevents lens from coming off.In order to prevent lens 1 in the skew of above-below direction, preferably relative to the substrate 4 of the part contacted with substrate 4 of circular cylinder shaped portion, in the upper side and lower side, these both sides form grappling fixture portion 6 (in Fig. 1 (a), only illustrating the grappling fixture portion 6 of bottom).In addition, grappling fixture portion 6 can not also be formed, but lens 1 are arranged on substrate 4 by the adjustment thickness of circular cylinder shaped portion of lens and the chimeric of the hole of substrate.
Fig. 2 is the figure of the situation of the light representing embodiments of the invention 1.Incide in lens 1 from light-emitting area 3 light out of LED module 2 from curved surface e and recess f, penetrate to lens 1 from par a, concave surface b, plane of refraction c, curved surface d.
As another example of installation method, Fig. 3 represents the method be arranged on by lens 100 on substrate 4.With regard to lens 1 and lens 100, basic comprising is identical.Have from the bottom surface of lens 100 along the parts 106 that the upper surface of substrate 4 extends with flat condition, the end face that the two ends of parts 106 embed substrate 4 is fixed.In order to fixed lens 100, although can the bonding agents such as silicon be used, also in the same manner as above-mentioned installation example, grappling fixture portion 6 can be formed and carries out anticreep.Method according to the present embodiment, compared with having the situation of the Fig. 1 in hole with the substrate 4 near LED module 2, owing to becoming large as the area of the substrate 4 near the LED module 2 of heater, therefore there is the effect being easy to the heat from LED module 2 is shed by substrate 4.
In addition, as another example of installation method, Fig. 4 represents the method for being installed at substrate 4 by lens 200.With regard to lens 1 and lens 200, basic comprising is identical.Form extensions 7 more than at least two places in the bottom of lens 1, by extension 7 with pressing plate 20 by being pressed on substrate 4, substrate 4 and pressing plate 20 screw 21 are fastenedly connected, thus lens 200 are arranged on substrate 4.The present embodiment screw 21 carries out the installation of substrate 4 and lens 200, owing to not using the resins such as silicon when engaging, therefore has the effect preventing bonding agent because of the caused timeliness deterioration such as heat.
The material of substrate 4 considers that thermal diffusivity expects the parts using thermal conductivity high.Such as, preferably use the metal material such as aluminum or aluminum alloy, copper, but if the high parts of thermal conductivity, then also can be other materials.
Fig. 5 represents sectional view when lens of the present invention being used as the substitute lighting device of incandescent lamp.Basic comprising is following formation: on substrate 4, load LED module 2, on the top of LED module 2, lens 1 are set, there is the cover 13 of the light transmission of covered substrate 4, there is in the rear side of LED module 2 loading surface of substrate 4 framework 10 of cavity, possess circuit 11 in the inside of framework 10, there is the lamp holder 12 for being connected with the socket of existing incandescent lamp.Not the shape only simulating incandescent lamp, luminous intensity distribution is not expanded with producing uneven luminance with lens 1, make luminous intensity distribution close to incandescent lamp, thus realize substituting of incandescent lamp.
The cover 13 of light transmission is connected with LED-baseplate 4 or framework 10.The material of cover 13 can be the resin such as polymethyl methacrylate or Merlon, also can use glass.Cover 13 can be transparent also can be coloured any one, but in order to increase the uniformity of the light shot out from lens, be finally that the particulate of the size of about the 1000nm by mixed silica and/or Merlon etc. has scattering properties.In addition, when using glass in the material of cover 13, by applying SiO in interior surfaces of glass 2deng particulate, thus scattering properties can be had.When the flickering that the flame wanting to obtain candle is such, the cover 13 of light transmission can also be made not have scattering.
Framework 10 doubles as the radiating piece of the storage of circuit 11 and the heat in LED module 2 generation, and such as the metal material such as aluminum or aluminum alloy, copper is more satisfactory therefore preferably to use the material that thermal conductivity is high, but also can use other materials.In addition, the cavity portion of framework 10 can also fill the resin of silicon etc.
Circuit 11 is in order to driving LED module 2, and has effect AC power being converted to dc source.Circuit 11 is made up of transformer, capacitor etc., but according to the specification of the LED module 2 used, the formation of circuit 11 is different.
For which; be described for the lighting device be arranged on the socket of incandescent lamp, but said lens is not limited to, for this incandescent lamp, also be applicable to the lighting device of other types; in the item recorded in the scope of request protection, the form of available various change is implemented.
In addition, in the above embodiment, use the LED module 2 of surface installing type as light source, but be not limited to this, also can use the LED of other types and other light-emitting component such as organic EL, inorganic EL etc.
In the present embodiment 2, other modes of embodiment 1 are described.Fig. 6 is the sectional view observed from the side of the illuminating part of embodiments of the invention 2.The material of lens is identical with embodiment 1 with method for making.In addition, par a, concave surface b, plane of refraction c, curved surface d and curved surface e are the formations identical with the lens 1 of embodiment 1.In lens 300, the formation different from lens 1 is arranged on the recess g with the truncated cone on the opposite face of the light-emitting area 3 of LED module 2.Recess g has side surface part g1 and bottom surface sections g2.Recess g is that area of section is along with the truncated cone diminished from light-emitting area side direction front.The opposite face of light-emitting area 3 is provided as the bottom surface sections g2 of par, thus as par g2 and a faced by, the light quantity from g2 to a can be increased.Recess g with optical axis 5 vertical direction on there is par, but also can be other shapes, such as, describe parabolical hemispherical.If be hemispherical, then light can be made more uniformly to bend because of refraction.In addition, in order to make light outgoing forwards can not become too much, the preferably size X of the bottom surface sections g2 of recess g 3than the size X of light-emitting area 3 4little.X 3and X 4the ratio of size in consideration illumination to being preferably about 2: 3 during concave surface b.But if the curved surface of adjustment concave surface b, controlling the rearward outgoing of light, then also can be other ratio.
In the present embodiment 3, other modes of embodiment 1 are described.Fig. 7 (a) is the sectional view observed from the side of the illuminating part of embodiments of the invention 3.The material of lens is identical with embodiment 1 with method for making.In addition, par a, concave surface b, plane of refraction c, curved surface d and curved surface e are the formations identical with the lens 1 of embodiment 1.Lens 400 are with the difference of lens 100: with the opposite face of LED module 2 on there is cone shape recess f, and also there is multiple cone shape recess h.By arranging multiple cone shape recess h, thus producing refraction at recess h, increasing the uniformity of illumination to the concave surface b of funnel type, therefore as a result, the uniformity of the luminous intensity distribution of light becomes good.Fig. 7 (b) represents the isometrical drawing of lens 400.Multiple cone shape recess h configures with concentric circles.With regard to the configuration of multiple cone shape recess h, be symmetrical when being desirably in make light expand equably that line is observed centered by optical axis 5.Can also be truncated cone similarly to Example 2 with the cone shape recess f that Fig. 7 (a) represents or describe such hemispherical of parabola.In addition, the shape that multiple cone shape recess h in the figure 7 by coniform expression, but also can be other shapes, such as Fuji type (pyramid) is such or describe parabolical hemispherical.
In the present embodiment 4, other modes of embodiment 1 are described.Fig. 8 is the sectional view observed from the side of the illuminating part of embodiments of the invention 4.The material of lens is identical with embodiment 1 with method for making.It is characterized in that, load the end bending of the substrate 150 of LED module 2 to the position lower than the face of loading LED module 2.In plane substrate 4, from the light of LED module 2 in the end scattering of substrate 4, therefore rearward outgoing light quantity reduces, if but use substrate 150, then rearward light can not crested, therefore can increase the rearward exit dose of light.The material of substrate 150 preferably uses the thermal conductivity of aluminum or aluminum alloy etc. high and is easy to the material of processing.When the termination of substrate 150 and framework 151 being closed, thermal conductivity improves.
In the present embodiment 5, other modes of embodiment 1 are described.Fig. 9 is the sectional view observed from the side when embodiments of the invention 5 being used as incandescent lamp.In embodiment 1, lens are fixed on substrate 4, but, in the present embodiment, lens 500 are fixed on cover 50.By being separated the distance of LED module 2 and lens, thus lens 500 deterioration because of heating can be prevented.In addition, the Exit positions of light is positioned at top compared with embodiment 1, therefore can increase the rearward outgoing of light.
The material of lens 500 and manufacture method are similarly to Example 1.Lens 500 preferably use transparent bonding agent to the fixing of cover 50, prevent lens 500 to be projected on cover cap 50 as shadow.As the example of transparent bonding agent, the bonding agent of organosilicon, acrylic acid, alicyclic epoxy resin, polyurethane etc. can be used, but, also can use other bonding agents.In addition, lens 500 can use a large amount of known technology such as light chisel and casting to come to manufacture with being integrally formed with cover 50.When being integrally formed, preferably lens 500 are identical with the material of cover 50, but also can be different materials.
Priority Applications (2)
|Application Number||Priority Date||Filing Date||Title|
|JP2011047073A JP5272029B2 (en)||2011-03-04||2011-03-04||Lens and lighting device|
|Publication Number||Publication Date|
|CN102654252A CN102654252A (en)||2012-09-05|
|CN102654252B true CN102654252B (en)||2015-04-22|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CN201210024745.2A CN102654252B (en)||2011-03-04||2012-02-06||Lens and illumination device|
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|JP (1)||JP5272029B2 (en)|
|CN (1)||CN102654252B (en)|
|TW (1)||TWI452232B (en)|
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