CN103032729B - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
CN103032729B
CN103032729B CN201210372021.7A CN201210372021A CN103032729B CN 103032729 B CN103032729 B CN 103032729B CN 201210372021 A CN201210372021 A CN 201210372021A CN 103032729 B CN103032729 B CN 103032729B
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CN
China
Prior art keywords
lens
light
light source
cover
lighting
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CN201210372021.7A
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Chinese (zh)
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CN103032729A (en
Inventor
饭塚亚纪子
中里典生
野村和男
赤井宽
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日立空调·家用电器株式会社
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Priority to JP2011221478A priority Critical patent/JP5868106B2/en
Priority to JP2011-221478 priority
Application filed by 日立空调·家用电器株式会社 filed Critical 日立空调·家用电器株式会社
Publication of CN103032729A publication Critical patent/CN103032729A/en
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Publication of CN103032729B publication Critical patent/CN103032729B/en

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Abstract

The invention provides a kind of lighting device.Realize a kind ofly easily carrying out the installation of LED and the making of cover, and employ and prevent the brightness disproportionation of light outgoing, make the wide lighting device and this lens that cause the lens of dome shape ground uniform.Comprising light source, for carrying structure, the cover they covered of light source and being used for expanding in the lighting device of lens of luminous intensity distribution, making the side of above described structure be reflecting surface, said lens is configured in the immediate vicinity at the maximum gauge place of above-mentioned cover.

Description

Lighting device

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 obtains propelling, and at lighting field, as the substitute of incandescent lamp in the past, people have carried out the research/development using the lamp of LED.This is because, compared with existing incandescent lamp, use the lamp of LED to have higher energy conversion efficiency.When considering the purposes expanding the lamp using LED, requirement directly can utilize the socket of existing incandescent lamp, expects that LED can use in the same manner as existing incandescent lamp.In addition, for incandescent lamp, when being rear when making socket direction relative to illuminating part, light is roughly dome shape ground outgoing equably from front to rear, so for the lamp using LED, need the irradiation realizing the light equal with the situation of installing incandescent lamp on ligthing paraphernalia.But, because the straightline propagation of the emergent light of LED is comparatively strong, when using comparably with incandescent lamp in the past, need the range of exposures (luminous intensity distribution, spatial light distribution) of the emergent light made from LED without brightness disproportionation ground expansion (expansion).Particularly need to expand range of exposures towards the direction (rear of the exit facet of LED) more than 180 ° from the exit facet of LED.

As an example of the method for the luminous intensity distribution of expansion (expansion) light, there is method as described in patent document 1, which, after the substrate of plane configures LED, by making this substrate bending, LED being three-dimensionally installed, and then the cover of light transmission of covered substrate is set, expand luminous intensity distribution thus.

In addition, the cover that replaced with by the cover of light transmission and there is high scattering function is disclosed in non-patent literature 1 to expand the method for luminous intensity distribution.

In addition, Patent Document 2 discloses a kind of prior art, be arranged on by LED on round table-like platform, this side uses reflector, and then arranges the translucent cover formed by the material with light diffusing, thus expansion luminous intensity distribution.

In addition, Patent Document 3 discloses a kind of method, light quantity LED module arranged for reducing forwards outgoing also correspondingly increases the lens of the light quantity to side (side) outgoing, and light guide member is set at the sidepiece of LED module, on the top of light guide member, reflection part is set, the light quantity utilizing lens to make to incide light guide member increases, and utilizes the reflection part on light guide member top that the light quantity of rearward outgoing is increased.

Patent document 1: Japanese Unexamined Patent Publication 2011-96594 publication

Patent document 2: Japanese Unexamined Patent Publication 2010-205553 publication (with reference to Fig. 7)

Patent document 3: Japanese Unexamined Patent Publication 2010-40364 publication (with reference to Fig. 6)

Non-patent literature 1:TOSHIBA Lighting & Technology Corporation gives a 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 that patent document 1 is recorded, need three-dimensionally LED to be installed, there is the possibility that manufacturing process becomes complicated, manufacturing cost raises.

And in the technology that non-patent literature 1 and patent document 2 are recorded, owing to utilizing translucent cover to make light scattering or diffusion, therefore the loss of light is comparatively large, in order to obtain necessary brightness, need to input larger energy by LED, possibly cannot obtain the feature of the lamp of energy-conservation this use LED.

In addition, in the structure shown in patent document 3, due to light guide member existing reflection part, therefore there is the possibility that luminous intensity distribution can not expand to above reflection part, cause the brightness disproportionation producing light outgoing.

The object of the invention is to, realize a kind ofly easily carrying out the installation of LED and the making of cover, and employ and prevent the brightness disproportionation of light outgoing, make the 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, for carrying structure, the cover their covered of light source and being used for expanding the lens of luminous intensity distribution, wherein, make the side of above described structure be reflecting surface, said lens is configured in the immediate vicinity at the 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, for arrange light source structure and by their cover cover, wherein, cover has light transmission, the shape that above described structure is round platform or cylinder or is combined by them, upper surface to the height of the light-emitting area of light source and the ratio arranging the diameter of the part of light source of above described structure of above described structure is the scope within more than 0.03 0.15, the height of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.5 1.83, the maximum gauge of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.83 2.16, the height of above described structure and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.33 0.5, the height of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.2 0.4, the external diameter of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.67 0.93, be arranged so that the plane by the maximum gauge of cover crosses a part for said lens.

In addition, the invention provides a kind of lighting device, it is characterized in that, comprise: light source, for arrange this light source structure, be arranged on the lens on above-mentioned light source and cover the cover of above-mentioned light source and said lens, above-mentioned cover is in having the roughly spherical of opening portion, this lens is set to the part making to be crossed said lens by the plane of the maximum gauge of above-mentioned cover, and above described structure is positioned at the inner side of the line connecting the upper end of said lens and the opening portion of above-mentioned cover.

In addition, the invention provides a kind of lighting device, it is characterized in that, comprise: multiple light source, for arrange above-mentioned light source structure and by their cover cover, cover has light transmission, the shape that above described structure is round platform or cylinder or is combined by them, above described structure to the height of above-mentioned light source and the ratio arranging the diameter of the part of light source of above described structure is the scope within more than 0.03 0.15, the height of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.5 1.83, the maximum gauge of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.83 2.16, the height of above described structure and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.33 0.5, the height of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.2 0.4, the external diameter of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.67 0.93, be arranged so that the plane by the maximum gauge of cover crosses a part for said lens.

According to the present invention, by using lens, the outgoing of the light in (socket direction) can be increased rearward, making the ground outgoing equably of photosphere planar.

In addition, by the position of light source is arranged on the position higher than cover opening portion, the situation that the emergent light from lens is blocked can be suppressed.

In addition, by making the side of the structure of configuration light source be reflecting surface, making scattering on cover and the light reflection that returns, increasing the uniformity of light.

According to the present invention, comprise light source, for carry light source structure, by their cover cover and be used for expanding in the lighting device of lens of luminous intensity distribution, the side of above described structure is made to be reflecting surface, said lens is configured in the immediate vicinity at the maximum gauge place of above-mentioned cover, thus, can realize easily carrying out the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make wide cause dome shape ground uniform lighting device.

In addition, according to the present invention, comprising light source, for arrange light source structure and by their cover cover lighting device in, cover has light transmission, the shape that above described structure is round platform or cylinder or is combined by them, upper surface to the height of the light-emitting area of light source and the ratio arranging the diameter of the part of light source of above described structure of above described structure is the scope within more than 0.03 0.15, the height of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.5 1.83, the maximum gauge of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.83 2.16, the height of above described structure and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.33 0.5, the height of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.2 0.4, the external diameter of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.67 0.93, be arranged so that the plane by the maximum gauge of cover crosses a part for said lens, thus, can realize easily carrying out the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device causing dome shape ground uniform.

In addition, according to the present invention, comprising light source, for arranging the structure of this light source, be arranged on the lens on above-mentioned light source and cover in the lighting device of cover of above-mentioned light source and said lens, above-mentioned cover is in having the roughly spherical of opening portion, this lens is set to the part making to be crossed said lens by the plane of the maximum gauge of above-mentioned cover, above described structure is positioned at the inner side of the line connecting the upper end of said lens and the opening portion of above-mentioned cover, thus, can realize easily carrying out the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device causing dome shape ground uniform.

In addition, according to the present invention, comprising multiple light source, for arrange above-mentioned light source structure and by their cover cover lighting device in, cover has light transmission, the shape that above described structure is round platform or cylinder or is combined by them, above described structure to the height of above-mentioned light source and the ratio arranging the diameter of the part of light source of above described structure is the scope within more than 0.03 0.15, the height of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.5 1.83, the maximum gauge of above-mentioned cover and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 1.83 2.16, the height of above described structure and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.33 0.5, the height of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.2 0.4, the external diameter of said lens and the ratio arranging the diameter of the part of light source of above described structure are the scope within more than 0.67 0.93, be arranged so that the plane by the maximum gauge of cover crosses a part for said lens, thus, can realize easily carrying out the installation of LED and the making of cover, and prevent the brightness disproportionation of light outgoing, make the wide lighting device causing dome shape ground uniform.

Accompanying drawing explanation

Fig. 1 is sectional view embodiments of the invention 1 being used 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 is the isometrical drawing of the state after being taken off by cover 1 in embodiments of the invention 1.

Fig. 4 is sectional view embodiments of the invention 2 being used as the situation of the substitute lighting device of incandescent lamp.

Fig. 5 is the isometrical drawing of the state after being taken off by cover 1 in embodiments of the invention 2.

Fig. 6 is sectional view embodiments of the invention 3 being used 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 embodiments of the invention 1.

Fig. 9 is the sectional view of the lens B20 of ring-type in embodiments of the invention 3.

Description of reference numerals

1 cover

4 columned reflectors

5 housings

6 circuit

7 sockets

8 cover opening portions

The upper end of 9 lens A2

21 lens installation portions

The 31 LED module C being placed on 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

A2 lens

A3, B30LED module

The lens of B20 ring-type

A par

The funnel shaped concave surface of b

The concave surface that b2 is arc

C plane of refraction

C2 exit facet

The curved surface of d bowl-type

E curved surface

The cone shape recess of f

The curved convex surface of f2

The concave surface of g Fuji chevron

H many cone shape recesses

The installed surface of p lens installation portion

Q plane

The position of ab cover maximum gauge

Cd connects the upper end of lens A2 and the line of cover opening portion

Ef connects the upper end of lens B20 and the line of cover opening portion

Detailed description of the invention

Below, use accompanying drawing that embodiment 1 to 3 is described.

[embodiment 1]

In the present embodiment, illustrate and easily carry out the installation of LED and the making of cover and the example preventing the lighting device of the brightness disproportionation of light outgoing.Fig. 1 is sectional view embodiments of the invention 1 being used 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 lighting device 100 in the drawings, with housing 5 for benchmark sets the direction at cover 1 place as front, the direction at socket 7 place is rear.To not that front the direction at rear neither be called side.The LED module A3 of chip on board encapsulation type is mounted on columned reflector 4.On the top of the light-emitting area of LED module A3, be provided with the lens for expanding luminous intensity distribution.There is the cover 1 of the light transmission covering columned reflector 4, LED module A3 and lens A2.Cover 1, in roughly spherical shape, has opening portion in a part.The cover opening portion of 1 is connected with the housing 5 of hollow.Housing 5, in truncated cone-shaped, has opening portion respectively 2 round shape parts.Each opening portion of housing 5 is communicated with, and housing 5 inside is hollow.The cover opening portion of 1 is connected with an opening portion of housing 5.The inside of housing 5 possesses circuit 6, and there is the socket 7 being used for being connected with the lamp socket of incandescent lamp in the past.According to said structure, when being arranged on lamp socket by lighting device 100, socket 7 accepts power supply from lamp socket, is energized from socket 7 pairs of circuit 6 by not shown wire, is energized from circuit 6 couples of LED module A3, and LED module A3 is luminous.Incide lens A2 from the light of LED module A3 outgoing, the light from lens A2 diffuses to the front of lens A2, side, rear outgoing.Fig. 2 represents the outside drawing of the lighting device 100 of the present embodiment, and Fig. 3 represents that the lighting device 100 from the present embodiment takes off the isometrical drawing of the state after cover.In Fig. 3, the mounting structure of lens and distribution etc. are omitted and represents.The present invention not only imitates the shape of incandescent lamp, also scioptics expansion luminous intensity distribution, and LED module A3 is placed on 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, thus play the effect that can realize the luminous intensity distribution identical with incandescent lamp.In addition, cover 1 realizes shortening and the simplification of operation by carrying out blow molding etc. to make.

By making reflector be cylindric, can suppress to be blocked from the light of lens A2 rearward outgoing.Be blocked to reduce light, the diameter of preferred columned reflector 4 is below the external diameter of upper end 9 of lens A2.In addition, by making the side of columned reflector 4 be reflecting surface, scattering on cover 1 can be made and return the light secondary reflection again of the inner side of cover 1, increasing the uniformity of light.

The sectional view of lens A2 is represented in Fig. 8.Arrange in the mode covering 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 form.In lens A2, curved surface e is the face relative with LED module A3.Curved surface e is hemispherical, covers the LED module A3 be configured on a face of planar substrates 140.Curved surface e is formed cone shape recess f.When set from LED module A3 irradiate light representational light as optical axis 500 time, cone shape recess f is formed in the part that optical axis 500 intersects with curved surface e.Cone shape recess f is arranged in the mode caved in the inner side of lens A2.Cone shape recess f is cone shape depression.Light from LED module A3 goes to curved surface e and cone shape recess f, incides in lens A2 from curved surface e and cone shape recess f.The exit facet of the light in lens A2 is made up 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 is 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 that connects with plane of refraction c from par a towards funnel shaped concave surface b 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 rear.Par a is arranged on by the bottom surface of funnel shaped concave surface b encirclement.Funnel shaped concave surface b has the function as making to incide from curved surface e and cone shape recess f the face that the light in lens A2 reflects to the direction of the plane of refraction c of the side and rear that are positioned at lens A2, and makes the Transmission light that reflects on plane of refraction c and the function of front outgoing to lens A2.Par a has to be made to incide the function of the light in lens A2 to the transmission of lighting device front from curved surface e and cone shape recess f.By par a, the exit dose of the light going to lighting device front is increased.In addition, plane of refraction c has the anaclasis that makes to reflect on funnel shaped concave surface b and from lens A2 to the function of the side of lighting device and rear outgoing, and makes the function that reflects to funnel shaped concave surface b direction from the light of curved surface e incidence.The curved surface d of bowl-type has to be made to incide anaclasis in lens A2 and from the function of lens A2 outgoing from curved surface e.From the curved surface d of bowl-type, light is to front to the side outgoing of lighting device.By forming cone shape recess f on curved surface e, the light quantity incided on funnel shaped concave surface b can be made to increase.Increased by the light quantity making to incide on funnel shaped concave surface b, the volume reflection from the light of funnel shaped concave surface b can be made to increase, thus can to the front of bulb, side, rear irradiation light, can brightness disproportionation be prevented.Reflect from the light of cone shape recess f incidence at funnel shaped concave surface b, compared with only arranging the situation of curved surface e, the light shining side to the rear of lighting device increases.By making increasing to side to the light of rear outgoing from lighting device, there is the function that the brightness disproportionation of lighting device entirety is reduced.

Consider the radiation modality of light to funnel shaped concave surface b, preferred optical axis 500 is about 20 ~ 60 ° with cone shape recess f angulation θ 1.Such as, when the angle of θ 1 is 48 °, the length of preferred par a is 0.6mm, and the size of funnel shaped concave surface b is the arc formed by 1/4 of the ellipse of 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 opening portion of the cone shape recess f by curved surface e is called the bottom surface of cone shape recess f, the size of the bottom surface of preferred cone shape recess f is less than the size of the light-emitting area of LED module A3.Owing to there is the light reflected on funnel shaped concave surface b via cone shape recess f, and via these 2 kinds of light of light that curved surface e reflects on funnel shaped concave surface b, thus can expand the emergent light 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 the arc formed by 1/4 of the ellipse of 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 a part of arc of the ellipse of radius 9mm × 12mm, curved surface e is a part of arc of the ellipse of radius 3mm × 8mm, and the thickness of lens 1 central part is 0.5mm.But if having adjusted the curvature of funnel shaped concave surface b, the rearward exit dose of adjustment light also can be then other ratios.

The profile of lens A2 is the shape roughly infundibulate and roughly bowl-type combined to make the relative mode of the less part of respective area.Time from the side, lens A2 is general hourglass.Roughly funnel shaped circumferential lateral surface is the plane of refraction c described in the present embodiment, and roughly funnel shaped inner circumferential side is the funnel shaped concave surface b described in the present embodiment.The par a described in the present embodiment by the part that roughly funnel shaped inner circumferential side bread encloses.Roughly the circumferential lateral surface of bowl-type is the curved surface d of the bowl-type described in the present embodiment, and roughly the inner circumferential side of the round platform of bowl-type is the curved surface e described in the present embodiment.A part of curved surface e arranges recess.The recess be arranged in a part of curved surface e is the cone shape recess f described in the present embodiment.In the present embodiment, the shape of cone shape recess f is coniform.One end of the curved surface d of bowl-type is connected with the end of curved surface e, and one end of plane of refraction c is connected with the other end of the curved surface d of bowl-type.One 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, roughly bowl-type in the present embodiment, but be not limited thereto.As long as reach the shape of the function of each, the profile of lens A2 is just not limited thereto.Such as, the shape of cone shape recess f also can be round table-like, to adjust the exit dose of the light going to front.

Lens A2 is placed through curved surface e and covers LED module A3.Light from the light-emitting area 3 of LED module A3 incides curved surface e and cone shape recess f.The light inciding curved surface e reflects by the curvature of curved surface e and the refractive index of lens A2.The luminous intensity distribution expanded forwards by curved surface e from the light of LED module A3 that straightline propagation is stronger.In addition, the light inciding cone shape recess f also reflects.The curved surface d of par a, funnel shaped concave surface b, plane of refraction c, bowl-type is arrived by the light of curved surface e.Funnel shaped concave surface b is arrived by the light of cone shape recess f.Arrive the light forwards outgoing of par a.Arrive in the light of funnel shaped concave surface b, a part of light is from funnel shaped concave surface b forwards outgoing, and its remaining light is reflected back toward in lens 1 again.The light arriving 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 to make the luminous intensity distribution expansion from the light of LED module A3 arrange.Funnel shaped concave surface b is in order to make light forwards transmission or arrange to lens A2 internal reflection.Par a is arranged to the front transmission of lens A2 to make light.Plane of refraction c is in order to make light go to the side of lens A2 and rear is arranged.The curved surface d of bowl-type goes to front and side to make light and arranges.

In the present embodiment, illustrate the example with the face relative with light-emitting area and the lens in the face that its opposite side caves in the inside, as long as but light can be made from front (cover direction) to 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 function ensureing expansion luminous intensity distribution, make lens less.

The centre of luminescence of incandescent lamp is the immediate vicinity of the position ab of cover maximum gauge.When reducing the height of columned reflector 4, in order to make the Exit positions of light be the position ab of cover maximum gauge, need the height (thickness) increasing lens.If increase the height (thickness) of lens, then there is the possibility that light loss increases.In addition, if make the position ab of the aspect ratio cover maximum gauge of columned reflector 4 higher, then there is lens A2 and the close together of cover 1, cover surface and mirrors the shadow of lens, the possibility of degraded appearance.Consider these problems, about cover 1, columned reflector 4, the suitable shape of lens A2, preferably be configured to from the height of columned reflector 4 to LED module A3 and the ratio of the diameter of columned reflector 4 be scope within more than 0.03 0.15, the height of cover 1 and the ratio of the diameter of columned reflector 4 are the scope within more than 1.5 1.83, the maximum gauge of cover 1 and the ratio of the diameter of columned reflector 4 are the scope within more than 1.83 2.16, height and the ratio of the diameter of columned reflector 4 of columned reflector 4 are the scope within more than 0.33 0.5, height and the ratio of the diameter of columned reflector 4 of lens are the scope within more than 0.2 0.4, external diameter and the ratio of the diameter of columned reflector 4 of lens are the scope within more than 0.67 0.93.In addition, because lens A2 is illuminator, the part making the horizontal plane of the position a of the maximum gauge by cover 1 cross lens A2 is preferably arranged to.Recess due to the upper surface of lens A2 is the reflecting surface for making light rearward outgoing, therefore in order to make light from the approximate centre outgoing of cover, by the horizontal plane of the position a of the maximum gauge of cover preferably lens A2 from upper end to the scope between short transverse half.If lens A2 can not reflect on cover, then also can be configured to the bottom of crossing lens A2.

Lens A2 can use the multiple known technology manufactures such as lathe, injection mo(u)lding, photocureable rapid shaping and casting.Lens A2 is made up of polymethyl methacrylate (PMMA is commonly called as acrylic) or Merlon (PC) etc.But, as long as translucent material, be not limited to these materials, but for the less material of light loss in energy-conservation viewpoint preferred lens.In addition, also can use multiple material, the particulate of about the 1000nm size be made up of polymethyl methacrylate or Merlon etc. in lens A2 internal mix can also be passed through, and make it have scattering properties.By making lens A2 have scattering properties, although the loss of light can increase because of scattering, can have evenly, light that brightness disproportionation is less.

The refractive index of lens A2 be preferably that general transparent component has about 1.54.Based on the material used, higher or lower refractive index can be had.Because the refraction of the light in lens A2 and reflection angle depend on refractive index, so depend on the refractive index of the material that lens A2 uses, need the change carrying out shape.

Eliminate the installation method of lens A2 in Fig. 1, make hook portion (handle portion) 60 at lens base as shown in Figure 8, use adhesive and the bolts etc. such as silicone to install.Also can install with additive method.

Cover 1 and the housing 5 of light transmission link.The material of cover 1 can be the resin such as polymethyl methacrylate or Merlon, also can use glass.Using when resin uses blow molding etc. shaping integratedly.Cover 1 can be transparent also can be coloured, and increases from the uniformity of the light of lens outgoing to make, and makes it have scattering properties preferably by the particulate of about the 1000nm size of mixed silica or Merlon etc.In addition, when the material of cover 1 uses glass, by the inner surface coating SiO at cover 2deng particulate, scattering properties can be made it have.When going for the such flickering of candle flame, the cover 1 of light transmission also can not have scattering.

Housing 5 is responsible for the heat radiation of the storage of circuit 6 and the heat of LED module A3 generation simultaneously, therefore preferably uses the material that thermal conductivity is higher, the such as metal material such as aluminum and its alloy, copper, but also can be other materials.The hollow bulb of this shell body 5 also can fill the resins such as silicone.In addition, the coating promoting heat radiation can also be applied from the teeth outwards.By housing 5 and columned reflector 4 being made as one, thermal conductivity is optimized, and by possessing the coating of heat radiation and reflection at surface application simultaneously, can also reduce operation.The outside of housing 5, also can be formed as radiating fin shape to improve radiating effect.When radiating effect improves, under same power, the luminous efficiency of LED module is also more excellent, therefore brighter.Consider the situation of replacing existing product, when additional radiating fin, be also preferably restricted to the appearance and size of existing incandescent lamp.

Circuit 6 has the effect in order to driving LED modules A 3, AC power being transformed to dc source.Circuit 6 is made up of transformer, capacitor etc., but depends on the design of the LED module A3 of use, and the structure of circuit 6 is different.

About this embodiment, be illustrated for the lighting device be arranged on the lamp socket of incandescent lamp, but above-mentioned columned reflector 4 and lens A2 are not limited to the lighting device of this incandescent lamp, also the lighting device of other types can be applied to, in the scope of the technical scheme of claim, can implement in the mode of various change.

In addition, in above embodiment, use the LED module A3 of chip on board encapsulation type as light source, but be not limited thereto, also can use the LED of other types or other light-emitting components such as organic EL, inorganic EL etc.

[embodiment 2]

In the present embodiment 2, other modes of embodiment 1 are described.Fig. 4 is sectional view embodiments of the invention 2 being used as the situation of the substitute lighting device of incandescent lamp.Fig. 5 is the isometrical drawing of the state after being taken off by cover of embodiment 2.In Fig. 5, the mounting structure of lens and distribution etc. are omitted and represents.The part different from embodiment uses round table-like reflector 40 to replace columned reflector 4.Remainder is identical with embodiment 1 so omit the description.By using round table-like reflector 40, scattering on cover 1 can be made and return inner side light reflect expeditiously.In addition, in order to prevent being blocked from the light of lens A2 outgoing, the side of preferably round table-like reflector 40 is positioned at the inner side of the upper end 9 and line cd of cover opening portion 8 connecting lens A2.In addition, if the side of the parts of mounting LED is positioned at the inner side of the upper end 9 and line cd of cover opening portion 8 connecting lens A2, then the parts loading LED may not be truncated cone-shaped, also can use the reflector of the shape such as combined by round platform and cylinder.In addition, due to when replacing incandescent lamp to use, when light source is positioned at the position identical with incandescent lamp, visual incongruity is less, therefore preferably makes the horizontal plane of the position ab of the maximum gauge of cover 1 cross upper end or a part of lens A2.

In which, also be arranged on lighting device on the lamp socket of incandescent lamp for example to be described, but above-mentioned round table-like reflector 40 and lens A2 are not limited to the lighting device of this incandescent lamp, also the lighting device of other types can be applied to, in the scope of the technical scheme of claim, can implement in the mode of various change.

In addition, in above embodiment, use the LED module A3 of chip on board encapsulation type as light source, but be not limited thereto, also can use the LED of other types or other light-emitting components such as organic EL, inorganic EL etc.

[embodiment 3]

In the present embodiment 3, the situation employing multiple light source is described.Fig. 6 is sectional view embodiment 3 being used as the situation of the substitute lighting device of incandescent lamp.As shown in Figure 7 (a), configure with making the LED module B30 concentric circles of surface installing type, the LED module of heart configuration wherein C31.By using multiple light source, the mixing of the colors such as neutral white (neutral white) and warm white can be carried out.

Similarly to Example 1, the lens B20 of preferred ring-type is positioned on the face that is made up of the horizontal plane of the position ab of cover maximum gauge.In addition, similarly to Example 2, the inclination of the side of preferably round table-like reflector 40 is positioned at the upper end 90 of the lens B20 connecting ring-type and the inner side of the line ef of cover opening portion 8.In addition, similarly to Example 1, when making lens move due to close cover, the shadow of lens can reflect on cover, bad order.

Consider these problems, suitable shape is preferably configured to: be the scope within more than 0.03 0.15 from the columned height of reflector 4 to LED module A3 and the ratio of the diameter of round platform upper surface, the cover height of 1 and the ratio of the diameter of round platform upper surface are the scope within more than 1.5 1.83, the cover maximum gauge of 1 and the ratio of the diameter of round platform upper surface are the scope within more than 1.83 2.16, the height of columned reflector 4 and the ratio of the diameter of round platform upper surface are the scope within more than 0.33 0.5, the height of lens and the ratio of the diameter of round platform upper surface are the scope within more than 0.16 0.37, the external diameter of lens and the ratio of the diameter of round platform upper surface are the scope within more than 0.53 0.97.

The lens B20 that light from the LED module C31 being configured in center enters ring-type becomes loss, so preferably do not configure LED module C31 at center as shown in Figure 7 (b) shows.But, if change the internal diameter of lens 20, reduce the incidence of the light from the LED module C31 being configured in center, then also can configure 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.The method of the impact of the resin distortion caused preferably by the deterioration of the heat be not easy when being subject to because lighting, in time process is fixed.The lens B20 of ring-type and lens installation portion 21 is one-body molded can reduce manufacturing process, but also can make respectively.

Use sectional view 9 that the shape of the lens B20 of ring-type is described.The lens B20 of ring-type comprises curved convex surface f2(the tenth face of the plane of incidence as the light from LED module B30), arc concave surface b2(the tenth one side), exit facet c2(the 12 face), the installed surface p of lens installation portion and plane q.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 front, the lens B20 of ring-type only covers a part for the light-emitting area of LED module B30.If when the size of light-emitting area is 1, the size in the region of covering is preferably about 0.2 ~ 0.8.If the amount covered more at least light increases to the outgoing in bulb front, the outgoing to bulb rear reduces, therefore preferably before and after 0.6.The state of the light from LED module outgoing is represented by the light 301 of the lens B20 of ring-type.Exist not by the lens B20 of ring-type directly to the light of forward direction outgoing and the light inciding the convex surface f2 on curved surface.The light entering the convex surface f2 on curved surface reflects on arc concave surface b2, and a part is through reflecting forwards outgoing.The light that arc concave surface b2 reflects by exit facet c2 refraction and forwards to rear outgoing.In order to reduce light loss, design reflection and outgoing that arc concave surface b2 makes the installed surface p of lens installation portion and plane q does not almost have light.If when the width of the light-emitting area of LED module is 1, the height of preferably arc recess is before and after 1.5, and width is before and after 1.4.Making the installed surface p of lens installation portion and plane q be par in the present embodiment, but substantially do not affect light due to shape, therefore also can be slightly have protruding curved surface.In addition, lens installation portion 21 also can be connected with plane q.

In the present embodiment, illustrate the lens B20 of the ring-type for making luminous intensity distribution expand, as long as but can rearward luminous intensity distribution, also can be the lens of other shapes.In addition, in order to reduce the light loss of lens, preferably in the scope ensureing expansion luminous intensity distribution, make lens less.

In which, be arranged on lighting device on the lamp socket of incandescent lamp for example to be described, and the lens B20 of above-mentioned round table-like reflector 40 and ring-type is not limited to the lighting device of this incandescent lamp, also the lighting device of other types can be applied to, in the scope of the technical scheme of claim, can implement in the mode of various change.

In addition, in above embodiment, use LED module B30 and B31 of surface installing type as light source, but be not limited thereto, also can use the LED of other types or other light-emitting components such as organic EL, inorganic EL etc.In addition, can also by they appropriately combined uses.

Claims (5)

1. a lighting device, is characterized in that, comprising:
Light source, for carrying structure, the cover their covered of light source and being used for expanding the lens of luminous intensity distribution, wherein,
The side of described structure is made to be reflecting surface, by the immediate vicinity of described lens configuration at the maximum gauge place of described cover,
Described lens have the face relative with the light-emitting area of described light source, with the face that the opposite side in the face relative with the light-emitting area of described light source caves in the inner side of described lens,
To the face caved in the inner side of described lens, have make to incide from the face relative with the light-emitting area of described light source the light in described lens to the function of the top outgoing of described lens and make its side to described lens, function that below is reflected,
The part in the face relative with the light-emitting area of described light source is provided with recess,
The shape of described recess is coniform or round table-like, makes to incide from described recess the side of light more to described lens on the face of caving in the inner side of described lens in described lens, below reflection instead of to outgoing above described lens.
2. lighting device as claimed in claim 1, is characterized in that:
In the inner side of the line of the upper end and cover opening portion that connect described lens, there is the reflecting surface of described structure.
3. a lighting device, is characterized in that, comprising:
Light source, for arranging structure, the cover their covered of light source and being used for expanding the lens of luminous intensity distribution, wherein,
Cover has light transmission, the shape that described structure is round platform or cylinder or is combined by them,
Upper surface to the height of the light-emitting area of light source and the ratio arranging the diameter of the part of light source of described structure of described structure is the scope within more than 0.03 0.15, the height of described cover and the ratio arranging the diameter of the part of light source of described structure are the scope within more than 1.5 1.83, the maximum gauge of described cover and the ratio arranging the diameter of the part of light source of described structure are the scope within more than 1.83 2.16, the height of described structure and the ratio arranging the diameter of the part of light source of described structure are the scope within more than 0.33 0.5, the height of described lens and the ratio arranging the diameter of the part of light source of described structure are the scope within more than 0.2 0.4, the external diameter of described lens and the ratio arranging the diameter of the part of light source of described structure are the scope within more than 0.67 0.93,
Be arranged so that a part of being crossed described lens by the plane of the maximum gauge of cover,
Described lens have the face relative with the light-emitting area of described light source, with the face that the opposite side in the face relative with the light-emitting area of described light source caves in the inner side of described lens,
To the face caved in the inner side of described lens, have make to incide from the face relative with the light-emitting area of described light source the light in described lens to the function of the top outgoing of described lens and make its side to described lens, function that below is reflected,
The part in the face relative with the light-emitting area of described light source is provided with recess,
The shape of described recess is coniform or round table-like, makes to incide from described recess the side of light more to described lens on the face of caving in the inner side of described lens in described lens, below reflection instead of to outgoing above described lens.
4. a lighting device, is characterized in that, comprising:
Light source, for arrange this light source structure, be arranged on the lens on described light source and cover the cover of described light source and described lens,
Described cover in having the roughly spherical of opening portion,
This lens is set to the part making to be crossed described lens by the plane of the maximum gauge of described cover,
Described structure is positioned at the inner side of the line connecting the upper end of described lens and the opening portion of described cover, described lens have the face relative with the light-emitting area of described light source, with the face that the opposite side in the face relative with the light-emitting area of described light source caves in the inner side of described lens
To the face caved in the inner side of described lens, have make to incide from the face relative with the light-emitting area of described light source the light in described lens to the function of the top outgoing of described lens and make its side to described lens, function that below is reflected,
The part in the face relative with the light-emitting area of described light source is provided with recess,
The shape of described recess is coniform or round table-like, makes to incide from described recess the side of light more to described lens on the face of caving in the inner side of described lens in described lens, below reflection instead of to outgoing above described lens.
5., as the lighting device in Claims 1 to 4 as described in any one, 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 caved in described lens interior, arranges in the mode covering described light source,
One end of described second is connected with the end of described first surface, and described second face is the curved surface of the sidepiece covering described first surface,
One end of described 3rd is connected with the other end of described second,
One end of described fourth face is connected with the other end of described 3rd, and described fourth face is the curved surface caved in described lens interior,
Described 5th is connected with the other end of described fourth face, is the face almost parallel with the light-emitting area of described light source,
Light from described light source incides in described lens from described first surface,
From the light of described first surface incidence go to described second, third, the 4th, the 5th,
Described second, make anaclasis from described first surface incidence and from described lens outgoing with the upper direction making it go to described lighting device,
Described 3rd, make to go to described fourth face at described intralens reflection to make it from the light of described first surface incidence, and make the anaclasis of reflecting from described fourth face and from described lens outgoing with the side making it and go to described lighting device, below,
Described fourth face, makes to go to described three at described intralens reflection to make it from the light of described first surface incidence, and makes from described 3rd anaclasis of reflecting from described lens outgoing with the top making it go to described lighting device,
Described 5th, make from the light of described first surface incidence from described lens outgoing with the top making it go to described lighting device,
Described first surface is provided with the recess caved in described lens interior,
Described fourth face instead of described 5th is gone to more from described light source incidence to the light of described recess.
CN201210372021.7A 2011-10-06 2012-09-29 Lighting device CN103032729B (en)

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CN103032729A (en) 2013-04-10

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