CN103032729A - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN103032729A CN103032729A CN2012103720217A CN201210372021A CN103032729A CN 103032729 A CN103032729 A CN 103032729A CN 2012103720217 A CN2012103720217 A CN 2012103720217A CN 201210372021 A CN201210372021 A CN 201210372021A CN 103032729 A CN103032729 A CN 103032729A
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Abstract
The invention provides a lighting device which enables easily installation of LEDs and manufacturing of covers and employs a lens capable of preventing non-uniform light emitting brightness and uniformly emitting light in a substantially spherical shape. The lighting device comprises a light source, a structural body for loading the light source, a shield covering the light source and the structural body, and a lens for spreading light distribution, wherein the side surface of the structural body is a reflective surface, and the lens is arranged near the center of a position on the shield where the diameter is the greatest.
Description
Technical field
The present invention relates to lighting device, particularly possess LED(Light Emitting Diode, light emitting diode) etc. semiconductor light-emitting elements as the lighting device of light source.
Background technology
In recent years, in order to prevent global warming, energy-saving has obtained propelling, and at lighting field, as the substitute of in the past incandescent lamp, people have carried out using the research/development of the lamp of LED.This be because, compare with existing incandescent lamp, use the lamp of LED that higher energy conversion efficiency is arranged.In the situation of considering the purposes that enlarges the lamp that uses LED, requirement can directly utilize the socket of existing incandescent lamp, and expectation LED lamp can similarly use with existing incandescent lamp.In addition, for incandescent lamp, when making the socket direction be the rear with respect to illuminating part, light is roughly dome shape equably outgoing of ground from the place ahead to the rear, so for the lamp that uses LED, need the irradiation of the equal light of realization and the situation that incandescent lamp is installed at ligthing paraphernalia.Yet, because the straightline propagation of the emergent light of LED is stronger, in situation about using comparably with in the past incandescent lamp, need to make the range of exposures (luminous intensity distribution, spatial light distribution) from the emergent light of LED expand (expansion) without brightness disproportionation ground.Particularly need to be towards direction (rear of the exit facet of LED) the expansion range of exposures that from the exit facet of LED, surpasses 180 °.
Example of method as the luminous intensity distribution of expansion (expansion) light, just like patent documentation 1 described method, after the substrate configuration LED on plane, by making this substrate bending LED is installed three-dimensionally, and then the cover of the light transmission of covered substrate is set, expand thus luminous intensity distribution.
In addition, disclose cover with light transmission in the non-patent literature 1 and replaced with cover with high scattering function with the method for expansion luminous intensity distribution.
In addition, disclose a kind of prior art in the patent documentation 2, LED is arranged on the round table-like platform, reflector is used in this side, and then the light transmission cover that is formed by the material with light diffusing is set, thus the expansion luminous intensity distribution.
In addition, a kind of method is disclosed in the patent documentation 3, be provided for reducing the light quantity of forwards outgoing and correspondingly increase the lens of the light quantity of (side) outgoing to the side at led module, and at the sidepiece of led module light guide member is set, top at light guide member arranges reflection part, utilize lens to make and incide the light quantity increase of light guide member, and utilize the reflection part on light guide member top that the light quantity of rearward outgoing is increased.
Patent documentation 1: TOHKEMY 2011-96594 communique
Patent documentation 2: TOHKEMY 2010-205553 communique (with reference to Fig. 7)
Patent documentation 3: TOHKEMY 2010-40364 communique (with reference to Fig. 6)
Non-patent literature 1:TOSHIBA Lighting﹠amp; Technology Corporation news briefing http://www.tlt.co.jp/tlt/topix/press/p110307a/p110307a_2.htm on March 7th, 2011
Summary of the invention
In the technology of patent documentation 1 record, need to LED be installed three-dimensionally, the possibility that exists manufacturing process's complicated, manufacturing cost to raise.
And in the technology of non-patent literature 1 and patent documentation 2 records, owing to utilize the light transmission cover to make light scattering or diffusion, so the loss of light is larger, in order to obtain necessary brightness, need to by the larger energy of LED input, possibly can't obtain the feature of the lamp of energy-conservation this use LED.
Therefore in addition, in the structure shown in the patent documentation 3, owing to have reflection part on the light guide member, exist luminous intensity distribution can not expand to the reflection part top, cause producing the possibility of the brightness disproportionation of light outgoing.
The object of the invention is to, realize a kind ofly carrying out easily the installation of LED and the making of cover, and used the brightness disproportionation that prevents the light outgoing, make wide lighting device and this lens that cause the lens of dome shape ground uniform.
The invention provides a kind of lighting device, it is characterized in that, comprise: light source, be used for to carry the structure of light source, the cover that their are covered and the lens that are used for the expansion luminous intensity distribution, wherein, the side that makes the said structure body is reflecting surface, said lens is configured near the center at maximum gauge place of above-mentioned cover.
In addition, the invention provides a kind of lighting device, it is characterized in that, comprise: light source, be used for arranging the structure of light source and the cover that they are covered, wherein, cover has light transmission, the said structure body is round platform or cylinder or the shape that combined by them, the upper surface of said structure body to the ratio of the height of the light-emitting area of light source and the diameter of the part that light source is set of said structure body is 0.15 with interior scope more than 0.03, the ratio of the height of above-mentioned cover and the diameter of the part that light source is set of said structure body is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of above-mentioned cover and the diameter of the part that light source is set of said structure body is 2.16 with interior scope more than 1.83, the ratio of the height of said structure body and the diameter of the part that light source is set of said structure body is 0.5 with interior scope more than 0.33, the ratio of the height of said lens and the diameter of the part that light source is set of said structure body is 0.4 with interior scope more than 0.2, the ratio of the external diameter of said lens and the diameter of the part that light source is set of said structure body be more than 0.67 0.93 with interior scope, be arranged so that the plane of the maximum gauge by cover crosses the part of said lens.
In addition, the invention provides a kind of lighting device, it is characterized in that, comprise: light source, be used for arranging this light source structure, be arranged on the lens on the above-mentioned light source and cover the cover of above-mentioned light source and said lens, above-mentioned cover is the roughly sphere with peristome, this lens is set to so that the part of said lens is crossed on the plane of the maximum gauge by above-mentioned cover, and the said structure body is positioned at the inboard of line of the peristome of the upper end that connects said lens and above-mentioned cover.
In addition, the invention provides a kind of lighting device, it is characterized in that, comprise: a plurality of light sources, be used for arranging the structure of above-mentioned light source and the cover that they are covered, cover has light transmission, the said structure body is round platform or cylinder or the shape that combined by them, said structure body to the ratio of the height of above-mentioned light source and the diameter of the part that light source is set of said structure body is 0.15 with interior scope more than 0.03, the ratio of the height of above-mentioned cover and the diameter of the part that light source is set of said structure body is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of above-mentioned cover and the diameter of the part that light source is set of said structure body is 2.16 with interior scope more than 1.83, the ratio of the height of said structure body and the diameter of the part that light source is set of said structure body is 0.5 with interior scope more than 0.33, the ratio of the height of said lens and the diameter of the part that light source is set of said structure body is 0.4 with interior scope more than 0.2, the ratio of the external diameter of said lens and the diameter of the part that light source is set of said structure body be more than 0.67 0.93 with interior scope, be arranged so that the plane of the maximum gauge by cover crosses the part of said lens.
According to the present invention, by using lens, can increase rearward the outgoing of the light of (socket direction), make planarly equably outgoing of photosphere.
In addition, be arranged on than cover peristome higher position by the position with light source, can suppress the situation that the emergent light from lens is blocked.
In addition, be reflecting surface by the side of structure that makes the configuration light source, make scattering on cover and the light reflection returned, increase uniformity of light.
According to the present invention, comprise light source, be used for to carry the structure of light source, the cover that their are covered and the lighting device that is used for the lens of expansion luminous intensity distribution, the side that makes the said structure body is reflecting surface, said lens is configured near the center at maximum gauge place of above-mentioned cover, thus, can realize carrying out easily the installation of LED and the making of cover, and prevent the light outgoing brightness disproportionation, make the wide lighting device that causes dome shape ground uniform.
In addition, according to the present invention, comprising light source, the lighting device of the cover that is used for arranging the structure of light source and their are covered, cover has light transmission, the said structure body is round platform or cylinder or the shape that combined by them, the upper surface of said structure body to the ratio of the height of the light-emitting area of light source and the diameter of the part that light source is set of said structure body is 0.15 with interior scope more than 0.03, the ratio of the height of above-mentioned cover and the diameter of the part that light source is set of said structure body is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of above-mentioned cover and the diameter of the part that light source is set of said structure body is 2.16 with interior scope more than 1.83, the ratio of the height of said structure body and the diameter of the part that light source is set of said structure body is 0.5 with interior scope more than 0.33, the ratio of the height of said lens and the diameter of the part that light source is set of said structure body is 0.4 with interior scope more than 0.2, the ratio of the external diameter of said lens and the diameter of the part that light source is set of said structure body is 0.93 with interior scope more than 0.67, be arranged to cross by the plane of maximum gauge of cover the part of said lens, thus, can realize carrying out easily the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device that causes dome shape ground uniform.
In addition, according to the present invention, comprising light source, be used for arranging the structure of this light source, be arranged in the lighting device of the lens on the above-mentioned light source and the cover that covers above-mentioned light source and said lens, above-mentioned cover is the roughly sphere with peristome, this lens is set to so that the part of said lens is crossed on the plane of the maximum gauge by above-mentioned cover, the said structure body is positioned at the inboard of line of the peristome of the upper end that connects said lens and above-mentioned cover, thus, can realize carrying out easily the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device that causes dome shape ground uniform.
In addition, according to the present invention, comprising a plurality of light sources, the lighting device of the cover that is used for arranging the structure of above-mentioned light source and their are covered, cover has light transmission, the said structure body is round platform or cylinder or the shape that combined by them, said structure body to the ratio of the height of above-mentioned light source and the diameter of the part that light source is set of said structure body is 0.15 with interior scope more than 0.03, the ratio of the height of above-mentioned cover and the diameter of the part that light source is set of said structure body is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of above-mentioned cover and the diameter of the part that light source is set of said structure body is 2.16 with interior scope more than 1.83, the ratio of the height of said structure body and the diameter of the part that light source is set of said structure body is 0.5 with interior scope more than 0.33, the ratio of the height of said lens and the diameter of the part that light source is set of said structure body is 0.4 with interior scope more than 0.2, the ratio of the external diameter of said lens and the diameter of the part that light source is set of said structure body is 0.93 with interior scope more than 0.67, be arranged to cross by the plane of maximum gauge of cover the part of said lens, thus, can realize carrying out easily the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device that causes dome shape ground uniform.
Description of drawings
Fig. 1 is with the sectional view of embodiments of the invention 1 as the situation of the substitute lighting device of incandescent lamp.
Fig. 2 is the isometrical drawing of the outward appearance of embodiments of the invention 1.
Fig. 3 will cover 1 the isometrical drawing of state after taking off in the embodiments of the invention 1.
Fig. 4 is with the sectional view of embodiments of the invention 2 as the situation of the substitute lighting device of incandescent lamp.
Fig. 5 will cover 1 the isometrical drawing of state after taking off in the embodiments of the invention 2.
Fig. 6 is with the sectional view of embodiments of the invention 3 as the situation of the substitute lighting device of incandescent lamp.
Fig. 7 is the lens B20 of ring-type of the present invention and the isometrical drawing of led module.
Fig. 8 is the sectional view of the lens A2 in the embodiments of the invention 1.
Fig. 9 is the sectional view of the lens B20 of the ring-type in the embodiments of the invention 3.
Description of reference numerals
1 cover
4 columned reflectors
5 housings
6 circuit
7 sockets
8 cover peristomes
The upper end of 9 lens A2
21 lens installation portions
31 are placed on the led module C at center
40 round table-like reflectors
The upper end of 90 lens B20
100 lighting devices
The light of 201 scioptics A2
The light of 301 scioptics B20
500 optical axises
600 centers
The A2 lens
A3, B30LED module
The lens of B20 ring-type
The a par
The funnel shaped concave surface of b
The concave surface that b2 is arc
The c plane of refraction
The c2 exit facet
The curved surface of d bowl-type
The e curved surface
The cone shape recess of f
The curved convex surface of f2
The concave surface of g Fuji chevron
Many cone shape recesses of h
The installed surface of p lens installation portion
The q plane
The position of ab cover maximum gauge
Cd connects the upper end of lens A2 and the line of cover peristome
Ef connects the upper end of lens B20 and the line of cover peristome
The specific embodiment
Below, use description of drawings embodiment 1 to 3.
[embodiment 1]
In the present embodiment, the making of the installation of carrying out easily LED and cover is described and prevents the example of lighting device of the brightness disproportionation of light outgoing.Fig. 1 is with the sectional view of embodiments of the invention 1 as the situation of the substitute lighting device of incandescent lamp.Lighting device 100 has cover 1, lens A2, led module A3, columned reflector 4, housing 5, circuit 6, socket 7, substrate 140.Below, in the lighting device 100 in the drawings, the direction of establishing cover 1 place take housing 5 as benchmark is the place ahead, the direction at socket 7 places is the rear.To not that the direction that the place ahead neither the rear is called the side.The led module A3 of chip on board encapsulation type carries on columned reflector 4.On the top of the light-emitting area of led module A3, be provided with the lens for the expansion luminous intensity distribution.Cover 1 with the light transmission that covers columned reflector 4, led module A3 and lens A2.Cover 1 is roughly spherical shape, has peristome in a part.The peristome of cover 1 is connected with the housing 5 of hollow.Housing 5 is truncated cone-shaped, has respectively peristome 2 round shape parts.Each peristome of housing 5 is communicated with, and housing 5 inside are hollow.The peristome of cover 1 is connected with a peristome of housing 5.The inside of housing 5 possesses circuit 6, and exist to be used for the socket 7 that is connected with the lamp socket of in the past incandescent lamp.According to said structure, lighting device 100 is installed in the situation on the lamp socket, socket 7 is accepted power supply from lamp socket, and from 6 energisings of 7 pairs of circuit of socket, from 6 pairs of led module A3 energisings of circuit, led module A3 is luminous by not shown wire.Incide lens A2 from the light of led module A3 outgoing, diffuse to the place ahead, side, the rear outgoing of lens A2 from the light of lens A2.Fig. 2 represents the outside drawing of the lighting device 100 of present embodiment, and Fig. 3 represents to take off from the lighting device 100 of present embodiment the isometrical drawing of the state behind the cover.Among Fig. 3, the mounting structure of lens and distribution etc. are omitted expression.The present invention not only imitates the shape of incandescent lamp, also scioptics are expanded luminous intensity distribution, and place led module A3 at columned reflector 4, make the centre of luminescence be positioned at the position identical with incandescent lamp, make luminous intensity distribution close to incandescent lamp, thereby play the effect that can realize the luminous intensity distribution identical with incandescent lamp.In addition, cover 1 is realized shortening and the simplification of operation by carrying out the making such as blow molding.
Be cylindric by making reflector, can suppress to be blocked from the light of rearward outgoing of lens A2.Be blocked in order to reduce light, the diameter of preferred columned reflector 4 is below the external diameter of upper end 9 of lens A2.In addition, be reflecting surface by the side that makes columned reflector 4, can make scattering on cover 1 and the light that returns cover 1 inboard secondary reflection again, increase uniformity of light.
The sectional view of expression lens A2 among Fig. 8.Arrange in the mode that covers led module A3.In the present embodiment, lens A2 is by par a(the 5th face), funnel shaped concave surface b(fourth face), plane of refraction c(the 3rd face), curved surface d(second face of bowl-type), curved surface e(first surface), cone shape recess f and hook portion (handle portion) 60 consist of.Among the lens A2, curved surface e is the face relative with led module A3.Curved surface e is hemispherical, covers the led module A3 on the face that is configured in planar substrates 140.Be formed with cone shape recess f at curved surface e.When establishing that representational light is optical axis 500 from the light of led module A3 irradiation, cone shape recess f is formed on the part that optical axis 500 and curved surface e intersect.Cone shape recess f arranges in the mode that caves in to the inboard of lens A2.Cone shape recess f is cone shape depression.Go to curved surface e and cone shape recess f from the light of led module A3, incide in the lens A2 from curved surface e and cone shape recess f.The exit facet of the light among the lens A2 is made of the curved surface d of par a, funnel shaped concave surface b, plane of refraction c, bowl-type.Par a and funnel shaped concave surface b are positioned at the top of lens A2, and the curved surface d of plane of refraction c and bowl-type is positioned at the sidepiece of lens A2.Funnel shaped concave surface b has the gradient that the part of joining towards funnel shaped concave surface b and plane of refraction c from par a expands to the upper direction of lens A2.Par a, funnel shaped concave surface b, plane of refraction c form roughly infundibulate.Plane of refraction c is positioned at the side of funnel shaped concave surface b to the rear.Par a is arranged on the bottom surface that is surrounded by funnel shaped concave surface b.Funnel shaped concave surface b has as making from curved surface e and cone shape recess f and incides light in the lens A2 to the function of the face of the direction reflection of the plane of refraction c at the side that is positioned at lens A2 and rear, and makes the light transmission of reflecting at plane of refraction c and to the function of the place ahead outgoing of lens A2.Par a has to make from curved surface e and cone shape recess f and incides light in the lens A2 to the function of lighting device the place ahead transmission.By par a, the exit dose of the light of going to lighting device the place ahead is increased.In addition, plane of refraction c has makes the anaclasis of reflecting at funnel shaped concave surface b and side from from lens A2 to lighting device and the function of rear outgoing, and makes the function from the light of curved surface e incident to funnel shaped concave surface b direction reflection.The curved surface d of bowl-type have make from curved surface e incide in the lens A2 anaclasis and from the function of lens A2 outgoing.From the curved surface d of bowl-type, light is to the place ahead to the side outgoing of lighting device.Increase by forming cone shape recess f at curved surface e, can make the light quantity that incides on the funnel shaped concave surface b.By the light quantity that incides on the funnel shaped concave surface b is increased, the reflection of light amount from funnel shaped concave surface b is increased, so can to the place ahead, side, the rear irradiation light of bulb, can prevent brightness disproportionation.Reflect at funnel shaped concave surface b from the light of cone shape recess f incident, compare with the situation that curved surface e only is set, the light that shines side to the rear of lighting device increases.Increase by making from the light to the rear outgoing to the side of lighting device, have the function of the brightness disproportionation minimizing that makes lighting device integral body.
Consider light to the radiation modality of funnel shaped concave surface b, preferred optical axis 500 is about 20～60 ° with cone shape recess f angulation θ 1.For example, when the angle of θ 1 was 48 °, the length of preferred par a was 0.6mm, and the size of funnel shaped concave surface b is oval-shaped 1/4 arc that consists of by radius 6mm * 12mm.But when the size variation of the angle of θ 1 and par a, the size of funnel shaped concave surface b also can change.In addition, when the peristome with the cone shape recess f of curved surface e was called the bottom surface of cone shape recess f, the size of the bottom surface of preferred cone shape recess f was less than the size of the light-emitting area of led module A3.Owing to there is the light that reflects at funnel shaped concave surface b via cone shape recess f, and these the 2 kinds of light of light that reflect at funnel shaped concave surface b via curved surface e, thereby can expand the emergent light of going to side to rear and prevent brightness disproportionation.In addition, when the angle of θ 1 is 48 °, the length of preferred par a is 0.6mm, the size of funnel shaped concave surface b is oval-shaped 1/4 arc that consists of by radius 6 * 12mm, funnel shaped concave surface b and plane of refraction c angulation are 55 °, and the curved surface d of bowl-type and the vertical bottom face of curved surface e are 1mm, and the curved surface d of bowl-type is oval-shaped a part of arc of radius 9mm * 12mm, curved surface e is oval-shaped a part of arc of radius 3mm * 8mm, and the thickness of lens 1 central part is 0.5mm.But, if adjusted the curvature of funnel shaped concave surface b, adjust the rearward exit dose of light, then also can be other ratios.
The profile of lens A2 is so that the shape that the less relative mode of part of area separately combines with infundibulate roughly and bowl-type roughly.Lens A2 is general hourglass in the time of from the side.Roughly funnel shaped circumferential lateral surface is the plane of refraction c described in the present embodiment, and roughly funnel shaped interior all sides are the funnel shaped concave surface b described in the present embodiment.Part by roughly funnel shaped interior all sides encirclement is the par a described in the present embodiment.Roughly the circumferential lateral surface of bowl-type is the curved surface d of the bowl-type described in the present embodiment, and roughly interior all sides of the round platform of bowl-type are the curved surface e described in the present embodiment.Part at curved surface e arranges recess.The recess that is arranged on the part of curved surface e is the cone shape recess f described in the present embodiment.In the present embodiment cone shape recess f be shaped as coniform.The end of the curved surface d of bowl-type is connected with the end of curved surface e, and the end of plane of refraction c is connected with the other end of the curved surface d of bowl-type.The end of funnel shaped concave surface b is connected with the other end of plane of refraction c, and par a is connected with the other end of funnel shaped concave surface b.Be expressed as roughly infundibulate, bowl-type roughly in the present embodiment, but be not limited to this.So long as reach the shape of the function of each face, the profile of lens A2 just is not limited to this.For example, the shape of cone shape recess f also can for round table-like, be gone to the exit dose of the light in the place ahead with adjustment.
Lens A2 is set to cover led module A3 by curved surface e.Light from the light-emitting area 3 of led module A3 incides curved surface e and cone shape recess f.The light that incides curved surface e reflects by the curvature of curved surface e and the refractive index of lens A2.What straightline propagation was stronger expands forwards luminous intensity distribution from the light of led module A3 by curved surface e.In addition, the light that incides cone shape recess f also reflects.Arrive the curved surface d of par a, funnel shaped concave surface b, plane of refraction c, bowl-type by the light of curved surface e.Light by cone shape recess f arrives funnel shaped concave surface b.Arrive the forwards outgoing of light of par a.Arrive in the light of funnel shaped concave surface b, a part of light is from forwards outgoing of funnel shaped concave surface b, and its remaining light is reflected back toward in the lens 1 again.The light that arrives the curved surface d of plane of refraction c and bowl-type from curved surface e and funnel shaped concave surface b reflects, light forwards, side, rear outgoing.Curved surface e is in order to make from the luminous intensity distribution expansion of the light of led module A3 and to arrange.Funnel shaped concave surface b is in order to make forwards transmission of light or to arrange to lens A2 internal reflection.Par a is in order to make light arrange to the place ahead transmission of lens A2.Plane of refraction c arranges for side and the rear that makes light go to lens A2.The curved surface d of bowl-type is in order to make light go to the place ahead and side and arrange.
In the present embodiment, represented to have the face relative with light-emitting area and at the example of the lens of the face of the inboard depression of its opposite side direction, as long as but can make light from the place ahead (cover direction) to the rear (socket direction) luminous intensity distribution, then also can adopt the lens of other shapes.In addition, in order to reduce the light loss of lens, preferably in the scope of the function that guarantees the expansion luminous intensity distribution, make lens less.
The centre of luminescence of incandescent lamp is near the center of position ab of cover maximum gauge.When reducing the height of columned reflector 4, for the outgoing position that makes light is the position ab of cover maximum gauge, need to increase the height (thickness) of lens.If increase the height (thickness) of lens, the possibility that then exists light loss to increase.In addition, if make the position ab of aspect ratio cover maximum gauge of columned reflector 4 higher, then have the close together of lens A2 and cover 1, the cover surface mirrors the shadow of lens, the possibility of degraded appearance.Consider these problems, about covering 1, columned reflector 4, the suitable shape of lens A2, the ratio that preferably constitutes height and the diameter of columned reflector 4 from columned reflector 4 to led module A3 is 0.15 with interior scope more than 0.03, the ratio of cover 1 height and the diameter of columned reflector 4 is 1.83 with interior scope more than 1.5, the ratio of cover 1 maximum gauge and the diameter of columned reflector 4 is 2.16 with interior scope more than 1.83, the ratio of the height of columned reflector 4 and the diameter of columned reflector 4 is 0.5 with interior scope more than 0.33, the ratio of the height of lens and the diameter of columned reflector 4 be more than 0.2 0.4 with interior scope, the ratio of the external diameter of lens and the diameter of columned reflector 4 is 0.93 with interior scope more than 0.67.In addition, because lens A2 is illuminator, preferred disposition becomes so that the part that the horizontal plane of the position a by covering 1 maximum gauge crosses lens A2.Because the recess of the upper surface of lens A2 is for being used for making the reflecting surface of rearward outgoing of light, therefore in order to make light from the approximate centre outgoing of cover, the horizontal plane of the position a of the maximum gauge by cover preferably lens A2 from the upper end to the scope of height direction between half.If lens A2 can not reflect on cover, the bottom that then yet can be configured to cross lens A2.
Lens A2 can use the multiple known technology manufacturings such as lathe, injection mo(u)lding, photocureable rapid shaping and casting.Lens A2 is made by polymethyl methacrylate (PMMA is commonly called as acrylic) or Merlon (PC) etc.But, so long as translucent material gets final product, be not limited to these materials, but for the less material of light loss in the energy-conservation viewpoint preferred lens.In addition, also can use multiple material, can also by the particulate of size about the 1000nm that is consisted of by polymethyl methacrylate or Merlon etc. in lens A2 internal mix, and make it have scattering properties.By making lens A2 have scattering properties, although the loss meeting of light increases because of scattering, can have the light more uniform, that brightness disproportionation is less.
The refractive index of lens A2 be preferably that general transparent component has about 1.54.Material based on using can have higher or lower refractive index.Because refraction and the reflection angle of the light in the lens A2 depend on refractive index, so depend on the refractive index of the material that lens A2 uses, need to carry out the change of shape.
Omit the installation method of lens A2 among Fig. 1, made as shown in Figure 8 hook portion (handle portion) 60 in the lens bottom surface, used the adhesive such as silicone and bolt etc. to install.Also can install with additive method.
The cover 1 of light transmission links with housing 5.The material of cover 1 can be the resins such as polymethyl methacrylate or Merlon, also can use glass.Use the integratedly moulding such as blow molding in the situation of use resin.Cover 1 can be transparent also can be coloured, and increase in order to make from the uniformity of light of lens outgoing, preferably the particulate by size about the 1000nm of mixed silica or Merlon etc. makes it have scattering properties.In addition, use in the situation of glass in the material of cover 1, by the inner surface coating SiO at cover
2Deng particulate, can make it have scattering properties.In the situation that goes for the such flickering of candle flame, the cover 1 of light transmission also can not have scattering.
About this embodiment, be illustrated as example take the lighting device that is installed on the lamp socket that incandescent lamp uses, but above-mentioned columned reflector 4 and lens A2 are not limited to the lighting device that this incandescent lamp is used, also can be applied to the lighting device of other types, in the scope of the technical scheme of claim, can implement in the mode of various changes.
In addition, in the above embodiment, use the led module A3 of chip on board encapsulation type as light source, but be not limited to this, also can use LED or such as organic EL, inorganic EL etc. of other light-emitting components of other types.
[embodiment 2]
In the present embodiment 2, other modes of embodiment 1 are described.Fig. 4 is with the sectional view of embodiments of the invention 2 as the situation of the substitute lighting device of incandescent lamp.Fig. 5 is the isometrical drawing of the state after embodiment 2 cover is taken off.Among Fig. 5, the mounting structure of lens and distribution etc. are omitted expression.The part different from embodiment is to use round table-like reflector 40 to replace columned reflector 4.Description thereof is omitted so remainder and embodiment 1 are identical.By using round table-like reflector 40, the light that returns the inboard covering scattering on 1 is reflected expeditiously.In addition, in order to prevent being blocked from the light of lens A2 outgoing, the side of preferred round table-like reflector 40 is positioned at the inboard of the upper end 9 that connects lens A2 and the line cd that covers peristome 8.In addition, if the side of parts of mounting LED is positioned at the inboard of the upper end 9 that connects lens A2 and the line cd of cover peristome 8, the parts that then load LED can not be truncated cone-shaped also, for example also can use the reflector of the shape that is combined by round platform and cylinder.In addition because in the situation that replaces incandescent lamp to use, when light source is positioned at the position identical with incandescent lamp visual inharmonious sense still less, therefore preferred so that cover upper end or the part that the horizontal plane of the position ab of 1 maximum gauge crosses lens A2.
In this mode, also be the lighting device that is installed on the lamp socket that incandescent lamp uses be that example describes, but above-mentioned round table-like reflector 40 and lens A2 are not limited to the lighting device that this incandescent lamp is used, also can be applied to the lighting device of other types, in the scope of the technical scheme of claim, can implement in the mode of various changes.
In addition, in the above embodiment, use the led module A3 of chip on board encapsulation type as light source, but be not limited to this, also can use LED or such as organic EL, inorganic EL etc. of other light-emitting components of other types.
[embodiment 3]
In the present embodiment 3, the situation of having used a plurality of light sources is described.Fig. 6 is with the sectional view of embodiment 3 as the situation of the substitute lighting device of incandescent lamp.Shown in Fig. 7 (a), make the led module B30 concentric circles ground configuration of surface installing type, therein heart configuration led module C31.By using a plurality of light sources, can carry out the mixing of the colors such as neutral white (neutral white) and warm white.
Similarly to Example 1, the lens B20 of preferred ring-type is positioned on the face that the horizontal plane by the position ab of cover maximum gauge consists of.In addition, similarly to Example 2, the inclination of the side of preferred round table-like reflector 40 is positioned at the upper end 90 of the lens B20 that connects ring-type and the inboard of the line ef of cover peristome 8.In addition, similarly to Example 1, owing to approach cover, the shadow of lens can reflect on cover, bad order when moving on making lens.
Consider these problems, suitable shape preferably constitutes: the ratio of the height from columned reflector 4 to led module A3 and the diameter of round platform upper surface is 0.15 with interior scope more than 0.03, the ratio of cover 1 height and the diameter of round platform upper surface is 1.83 with interior scope more than 1.5, the ratio of cover 1 maximum gauge and the diameter of round platform upper surface is 2.16 with interior scope more than 1.83, the ratio of the height of columned reflector 4 and the diameter of round platform upper surface is 0.5 with interior scope more than 0.33, the ratio of the height of lens and the diameter of round platform upper surface be more than 0.16 0.37 with interior scope, the ratio of the external diameter of lens and the diameter of round platform upper surface is 0.97 with interior scope more than 0.53.
The lens B20 that enters ring-type from the light of the led module C31 that is configured in the center becomes loss, so preferably do not dispose led module C31 such as Fig. 7 (b) center that is shown in.But, if the internal diameter of change lens 20 reduces the incident from the light of the led module C31 that is configured in the center, then also can dispose this led module C31.
About the installation of the lens B20 of ring-type, make lens installation portion 21 etc., fix with adhesives such as silicone.Preferably by be not easy to be subject to the heat when lighting, the method for the in time impact of the deteriorated resin distortion that causes of process is fixed.The lens B20 of ring-type and lens installation portion 21 are one-body molded can to reduce manufacturing process, but also can make respectively.
Use the shape of the lens B20 of sectional view 9 explanation ring-types.The lens B20 of ring-type comprises as curved convex surface f2(the tenth face from the plane of incidence of the light of led module B30), arc concave surface b2(the tenth one side), exit facet c2(the 12 face), installed surface p and the plane q of lens installation portion.In addition, be arranged so that center 600 is the center of the blank part of the lens B20 of ring-type.In addition, in order to make light to the outgoing of bulb the place ahead, the lens B20 of ring-type only covers the part of the light-emitting area of led module B30.If the size of light-emitting area is 1 o'clock, the size in the zone of covering is preferably about 0.2～0.8.If the amount that covers more at least light increases to the outgoing in bulb the place ahead, reduce to the outgoing at bulb rear, therefore be preferably 0.6 front and back.Light 301 expressions of lens B20 by ring-type are from the state of the light of led module outgoing.Exist not by ring-type lens B20 directly forwards direction outgoing light and incide the light of the convex surface f2 on the curved surface.The light that enters the convex surface f2 on the curved surface reflects at arc concave surface b2, and a part is through reflecting forwards outgoing.The light that reflects at arc concave surface b2 passes through in exit facet c2 refraction and forwards to the rear outgoing.In order to reduce light loss, design arc concave surface b2 and make on the installed surface p of lens installation portion and the plane q and almost do not have reflection of light and outgoing.If the width of the light-emitting area of led module is 1 o'clock, the height of preferred arc recess is 1.5 front and back, and width is 1.4 front and back.Making installed surface p and the plane q of lens installation portion in the present embodiment is the par, but because shape does not have impact substantially on light, therefore also can be the curved surface that slightly has projection.In addition, lens installation portion 21 also can be connected with plane q.
In the present embodiment, represented to be used for to make the lens B20 of the ring-type of luminous intensity distribution expansion, but so long as luminous intensity distribution rearward also can be the lens of other shapes.In addition, in order to reduce the light loss of lens, preferably in the scope that guarantees the expansion luminous intensity distribution, make lens less.
In this mode, be the lighting device that is installed on the lamp socket that incandescent lamp uses be that example describes, and above-mentioned round table-like reflector 40 and the lens B20 of ring-type are not limited to the lighting device that this incandescent lamp is used, also can be applied to the lighting device of other types, in the scope of the technical scheme of claim, can implement in the mode of various changes.
In addition, in the above embodiment, use the led module B30 of surface installing type and B31 as light source, but be not limited to this, also can use LED or such as organic EL, inorganic EL etc. of other light-emitting components of other types.In addition, their appropriate combination can also be got up use.
Claims (8)
1. a lighting device is characterized in that, comprising:
Light source, be used for to carry the structure of light source, the cover that their are covered and the lens that are used for the expansion luminous intensity distribution, wherein,
The side that makes described structure is reflecting surface, with described lens configuration near the center at the maximum gauge place of described cover.
2. lighting device as claimed in claim 1 is characterized in that:
In the inboard of the upper end that connects described lens with the line of cover peristome, has the reflecting surface of described structure.
3. a lighting device is characterized in that, comprising:
Light source, be used for arranging the structure of light source and the cover that their are covered, wherein,
Cover has a light transmission, and described structure is round platform or cylinder or the shape that combined by them,
The upper surface of described structure to the ratio of the height of the light-emitting area of light source and the diameter of the part that light source is set of described structure is 0.15 with interior scope more than 0.03, the ratio of the height of described cover and the diameter of the part that light source is set of described structure is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of described cover and the diameter of the part that light source is set of described structure is 2.16 with interior scope more than 1.83, the ratio of the height of described structure and the diameter of the part that light source is set of described structure is 0.5 with interior scope more than 0.33, the ratio of the height of described lens and the diameter of the part that light source is set of described structure is 0.4 with interior scope more than 0.2, the ratio of the external diameter of described lens and the diameter of the part that light source is set of described structure is 0.93 with interior scope more than 0.67
Be arranged so that a part of crossing described lens by the plane of maximum gauge of cover.
4. a lighting device is characterized in that, comprising:
Light source, be used for arranging this light source structure, be arranged on the lens on the described light source and cover the cover of described light source and described lens,
Described cover is the roughly sphere with peristome,
This lens is set to so that the part that described lens are crossed on the plane of the maximum gauge by described cover,
Described structure is positioned at the inboard of line of the peristome of the upper end that connects described lens and described cover.
5. such as the described lighting device of any one in the claim 1～4, it is characterized in that:
Described lens have the face relative with the light-emitting area of described light source, with the face in the inboard of the described lens of an opposite side direction of the face relative with the light-emitting area of described light source depression,
To the face of the inboard of described lens depression, have to make from the face relative with the light-emitting area of described light source and incide light in the described lens to the function of the top outgoing of described lens and make the function of its side to described lens, below reflection,
Part at the face relative with the light-emitting area of described light source is provided with recess,
The shape of described recess so that from described recess incide in the described lens light on the face of the inboard of described lens depression more to the side of described lens, below reflection rather than outgoing above the described lens.
6. such as the described lighting device of any one in the claim 1～4, it is characterized in that:
Described lens comprise top, sidepiece and bottom,
Described bottom has the first surface of described lens,
Described sidepiece has second and the 3rd of described lens,
Described top has the fourth face of described lens and the 5th,
Described first surface is the hemispheric curved surface to described lens inner recess, arranges in the mode that covers described light source,
Described second end is connected with the end of described first surface, and described the second face is the curved surface that covers the sidepiece of described first surface,
Described the 3rd end is connected with described second other end,
One end of described fourth face is connected with described the 3rd other end, and described fourth face is the curved surface to described lens inner recess,
Described the 5th is connected with the other end of described fourth face, is the face with the light-emitting area almost parallel of described light source,
Light from described light source incides in the described lens from described first surface,
From the light of described first surface incident go to described second, third, the 4th, the 5th,
Described second, make from the anaclasis of described first surface incident and from described lens outgoing so that it goes to the upper direction of described lighting device,
Described the 3rd, make light from described first surface incident at described intralens reflection so that it goes to described fourth face, and make from the anaclasis of described fourth face reflection and from described lens outgoing so that it goes to side, the below of described lighting device,
Described fourth face, make light from described first surface incident at described intralens reflection so that it goes to described the 3rd, and make from the anaclasis of described the 3rd reflection and from described lens outgoing so that it goes to the top of described lighting device,
Described the 5th, make light from described first surface incident from described lens outgoing so that it goes to the top of described lighting device,
Be provided with to the recess of described lens inner recess at described first surface,
The light that incides described recess from described light source is gone to described fourth face rather than described the 5th more.
7. a lighting device is characterized in that, comprising:
A plurality of light sources, be used for arranging the structure of described light source and the cover that their are covered,
Cover has a light transmission, and described structure is round platform or cylinder or the shape that combined by them,
Described structure to the ratio of the height of described light source and the diameter of the part that light source is set of described structure is 0.15 with interior scope more than 0.03, the ratio of the height of described cover and the diameter of the part that light source is set of described structure is 1.83 with interior scope more than 1.5, the ratio of the maximum gauge of described cover and the diameter of the part that light source is set of described structure is 2.16 with interior scope more than 1.83, the ratio of the height of described structure and the diameter of the part that light source is set of described structure is 0.5 with interior scope more than 0.33, the ratio of the height of described lens and the diameter of the part that light source is set of described structure is 0.4 with interior scope more than 0.2, the ratio of the external diameter of described lens and the diameter of the part that light source is set of described structure is 0.93 with interior scope more than 0.67
Be arranged so that a part of crossing described lens by the plane of maximum gauge of cover.
8. lighting device as claimed in claim 7 is characterized in that:
Described lens have make from the tenth of the light incident of light source, make incident the light reflection the tenth one side and as the 12 of exit facet, the tenth face is to be positioned at the locational curved surface relative with the light-emitting area of light source, the tenth one side is to protrude to the side of light source to be arc curved surface, the tenth end is connected with the end of the tenth one side, the end of the tenth one side is connected with the 12 end, incide in these lens from the tenth face from the wide many of light source, in the tenth one side reflection, the 12 refraction and from the rearward outgoing of the place ahead of described light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-221478 | 2011-10-06 | ||
| JP2011221478A JP5868106B2 (en) | 2011-10-06 | 2011-10-06 | Lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032729A true CN103032729A (en) | 2013-04-10 |
| CN103032729B CN103032729B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210372021.7A Expired - Fee Related CN103032729B (en) | 2011-10-06 | 2012-09-29 | Lighting device |
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| Country | Link |
|---|---|
| JP (1) | JP5868106B2 (en) |
| CN (1) | CN103032729B (en) |
| TW (1) | TWI512237B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013084346A (en) | 2013-05-09 |
| TW201323779A (en) | 2013-06-16 |
| JP5868106B2 (en) | 2016-02-24 |
| CN103032729B (en) | 2015-09-02 |
| TWI512237B (en) | 2015-12-11 |
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