CN204611662U - Lighting device - Google Patents

Abstract

Lighting device (1) possesses: circuit board; Be installed in the light-emitting component on circuit board; There is loading surface and on loading surface, load the framework of circuit board; The optics of covering luminous element; And the cover of the light transmission of covering optics.Optics has lens, and these lens have light entrance face and light emergence face, and has the lens axis intersected with light entrance face and light emergence face.Lens axis is orthogonal with loading surface.Light entrance face has relative with light-emitting component and the flexure plane caved on lens axis direction.Light emergence face has and the flexure plane that on lens axis direction cave in opposing with the plane of incidence.

Description

Lighting device

Technical field

The utility model relates to the lighting device of the light-emitting components such as light emitting diode (LED:Light Emitting Diode), laser diode (LD:Laser Diode) as light source.

Background technology

Because the semiconductor light-emitting elements such as LED can send the light of high brightness with low-power, and long service life, therefore the light source of the lighting device of incandescent lamp or fluorescent lamp is constantly popularized as an alternative.Such as, disclosed in Japanese Unexamined Patent Publication 2013-48167 publication, lighting device is possess: discoideus framework, for the power supply of powering to the LED of the central authorities being arranged on framework and be configured to circular multiple LED centered by this power supply.Adjusted after luminous intensity distribution distributes from the light of LED injection by and lens that are that put relative with each LED, by relative with the light emergence face of lens and the cover of light transmission that is that put spreads, thus be irradiated to outside.

Utility model content

Lighting device of the present utility model has: circuit board; Be installed in the light-emitting component on circuit board; There is loading surface, and on loading surface, be mounted with the framework of circuit board; The optics of covering luminous element; And the cover of the light transmission of covering optics.Optics has lens, and these lens comprise light entrance face and light emergence face, and these lens have the lens axis intersected with light entrance face and light emergence face.Lens axis is orthogonal with loading surface.Light entrance face has the flexure plane relative with light-emitting component, and this flexure plane caves in along the direction of lens axis.Light emergence face has the flexure plane opposing with the plane of incidence, and this flexure plane caves in along the direction of lens axis.Will from light-emitting component injection and the light inciding light entrance face as incident light, using the light of incident light when advancing in the inside of lens as light in lens, light in lens is injected to from light emergence face lens outside light as injection light, using relative to light in the lens of lens axis travel angle as the first angle θ 1, using the travel angle of the injection light relative to lens axis as the second angle θ 2 time, θ 2/ θ 1 has maximum in the scope of 20 °≤θ 1≤80 °.

By above formation, from the better appearance that can seem during lighting device in the lighting of front.

Accompanying drawing explanation

Fig. 1 is the exploded perspective view of the lighting device involved by embodiment of the present utility model.

Fig. 2 A is the oblique view of the lens of the lighting device shown in pie graph 1.

Fig. 2 B is the sectional view of the lens at the 2B-2B line place of Fig. 2 A.

Fig. 3 is a part of sectional view on the cross section of the central shaft Z comprising the lighting device shown in Fig. 1.

Fig. 4 A is the sectional view in the region of the dotted line corral of Fig. 3, and Fig. 4 B is the sectional view of the variation that Fig. 4 A is shown.

Fig. 5 shows the relation of θ 2/ θ 1 for the angle θ 1 in the lens shown in Fig. 2 A.

Fig. 6 shows the distribution curve flux of the light from the lens injection shown in Fig. 2 A.

Fig. 7 is the sectional view of the variation of the lens of the lighting device shown in pie graph 1.

Fig. 8 shows the relation of θ 2/ θ 1 for angle θ 1 in the lens shown in Fig. 7.

Fig. 9 shows the distribution curve flux of the light from the lens injection shown in Fig. 7.

Figure 10 A shows the uniformity of the light irradiated from the lighting device shown in Fig. 1.

Figure 10 B shows the uniformity of the light irradiated from lighting device in the past.

Figure 11 A is the exploded perspective view of the lighting device involved by other embodiment.

Figure 11 B is the sectional view of the lighting device at the 11B-11B line place of Figure 11 A.

Detailed description of the invention

Before embodiment of the present utility model is described, first the problem of the lighting device in correlation technique is described.In the lighting device disclosed in Japanese Unexamined Patent Publication 2013-48167 publication, be configured with power supply at the central portion of framework, and be configured with cover installation portion at the periphery of framework.For this reason, the central portion of framework and periphery just can not configure LED, like this, for the illumination of the light penetrated from LED, and will be lower than the illumination on other position in the illumination of the position relative with periphery with the central portion of framework of cover inner surface.Like this, when from lighting device in the outside lighting of cover, the central portion of cover and the brightness of periphery will be lower than the brightness of other position, because this reducing aesthetic property.

Referring to accompanying drawing, the lighting device involved by a form of the present utility model is described.Further, the embodiment that below will illustrate is a preferred object lesson.Therefore, the order etc. of the allocation position of the numerical value shown in following embodiment, shape, material, inscape, inscape and connected mode, operation, operation is an example, is not the restriction carried out the utility model.Therefore, for illustrating the inscape do not recorded in the independent claims of upper concept of the present utility model in the inscape of following embodiment, illustrate as arbitrary inscape.Further, each figure is ideograph, is not rigorous diagram.Give identical symbol for structure identical in fact in each figure, and omit or simplify the explanation repeated.

(embodiment)

Referring to figs. 1 through Fig. 4 B, the lighting device 1 involved by embodiment of the present utility model is described.Fig. 1 is the exploded perspective view of lighting device 1.Fig. 2 A is the oblique view of the lens 41 forming lighting device 1.Fig. 2 B is the sectional view of the lens 41 at the 2B-2B line place of Fig. 2 A.Fig. 3 is a part of sectional view on the cross section of the central shaft Z comprising lighting device 1.Fig. 4 A is the amplification sectional view in the region of the dotted line corral of Fig. 3, and Fig. 4 B is the sectional view of the variation that Fig. 4 A is shown.

Lighting device 1 is mounted in the lamp affixed to the ceiling on the ceiling in the room of the residence spaces such as living room.As shown in Figure 1, lighting device 1, in plane apparent time, is the toroidal centered by central shaft Z.Lighting device 1 possesses: the cover 5 of framework 2, the light source portion 3 being loaded in framework 2, the optics 4 covering light source portion 3 and covering optics 4.Light source portion 3 has circuit board 32 and is installed in the light-emitting component 31 on circuit board 32.Framework 2 has loading surface 21a, and loading surface 21a is mounted with light source portion 3.That is, lighting device 1 possesses: circuit board 32, the light-emitting component 31 be installed on circuit board 32, loading surface 21a is mounted with the framework 2 of circuit board 32, the optics 4 of covering luminous element 31 and covers the cover 5 of light transmission of optics 4.

Below each formation is described in detail.

[framework]

Framework 2 is circular plate-shaped member in plane apparent time.The face of one side of the framework 2 of tabular is the loading surface 21a of light source portion 3, and the face of the opposing party is towards the installed surface 21b of ceiling.That is, loading surface 21a and installed surface 21b is away form one another.Loading surface 21a is toroidal in plane apparent time, has opening portion 22 at central portion.The Center-to-Center axle Z of opening portion 22 is consistent.Be configured with power supply 6 in the inside of opening portion 22, the power supply of subtend light source portion 3 controls.

Framework 2 has the reflecting part 24 surrounding loading surface 21a, and this reflecting part 24 is outstanding to the direction of cover 5.Reflecting part 24 such as can by carrying out bending process to be formed to the periphery of framework 2.Reflecting part 24, by the light (shown in dotted arrow) of the side towards lighting device 1 among the light that penetrates from optics 4, reflexes to the direction of cover 5.Accordingly, the brightness of the irradiation light of the periphery of the cover 5 of lighting device 1 can be increased.The film be made up of whitewash or the vapor-deposited film be made up of light reflective metal material is formed at reflecting part 24 and loading surface 21a.Loading surface 21a such as can reflect the visible ray of 75 ~ 95%.Particulate such as containing the light reflective such as titanium oxide or brium carbonate in whitewash.Further, light reflective metal such as can adopt aluminium etc.

Framework 2 has multiple cover installation portion 23, and this cover installation portion 23 is positioned at the periphery of loading surface 21a.Cover installation portion 23 is for mounting cup 5.

Framework 2 such as can by carrying out punching press, cutting etc. to be formed to aluminium sheet or steel plate etc.

[light source portion]

Light source portion 3 has circuit board 32 and light-emitting component 31.Circuit board 32 is provided with multiple light-emitting component 31.The light penetrated from the light-emitting component 31 of light source portion 3 via optics 4, and irradiates to cover 5.

Circuit board 32 is circular plate-shaped member in plane apparent time, and its central authorities are formed with circular through hole 30.The wiring pattern (not shown) that circuit board 32 has the such as insulative substrate such as glass epoxy substrate or ceramic substrate and is formed in insulative substrate.At circuit board 32, using be used for the face of installing light emitting element 31 as front 321, using with front 321 back to face as the back side 322.Wiring pattern is formed on front 321.The light-emitting component 31 be loaded on circuit board 32 is electrically connected with wiring pattern, and wiring pattern is electrically connected with the lamp circuit of power supply 6 described later.That is, the electric power that light-emitting component 31 is supplied by power supply 6 comes luminous.

Circuit board 32 makes the back side 322 be installed in framework 2 towards loading surface 21a.The Center-to-Center axle Z of the center of through hole 30 and the loading surface 21A of framework 2 is consistent.

At lighting device 1, although circuit board 32 is made up of these four pieces of insulative substrate of circuit board 32a ~ 32d, but be not limited by this, also can be made up of one piece of insulative substrate.As lighting device 1, by forming circuit board 32 by polylith insulative substrate, thus the utilization ratio of the insulative substrate when the manufacture of circuit board 32 can be improved.

In lighting device 1, amount to 200 light-emitting components 31 and be installed on circuit board 32 in the mode along the circular arc be made up of 4 concentric circles.At circuit board 32, the number of the light-emitting component installed successively from 4 concentrically ringed inner sides is, 44,44,44,68.Each substrate of circuit board 32a ~ 32d is provided with 50 light-emitting components 31.Circuit board 32a ~ 32d each on, along 4 circular arcs, the number of the light-emitting component 31 installed successively from inner side is 11,11,11,17.

When the alignment pattern intensity of the light penetrated from light-emitting component 31 being become maximum direction as element optical axis Ax1, the element optical axis Ax1 of each light-emitting component 31 is orthogonal with the front 321 of circuit board 32.And element optical axis Ax1 is also orthogonal with loading surface 21a.

Light-emitting component 31 has: the blue LED die such as sending blue light; To the encapsulant that this blue LED die seals; And be dispersed to encapsulant, for blue light being transformed to the fluorophor of sodium yellow.The white light be synthesized into by blue light and sodium yellow is penetrated from light-emitting component 31.As blue LED die, such as, can be used in the semiconductor light-emitting elements that gallium nitride (GaN) that wavelength 440nm ~ 470nm has luminescence peak is.As fluorophor, such as, can be used in the yellow fluorophor that wavelength 540nm ~ 580nm has the YAG system of luminescence peak.Further, as encapsulant, such as, the silicones of light transmission can be used.

At lighting device 1, light-emitting component 31 has SMD (Surface-Mount-Device: surface mount) structure, such as, in once mounting, blue LED die is installed to packaging body, in secondary installing, is installed to by packaging body on circuit board 32.Further, light-emitting component 31 also can be COB (Chip-On-Board: chip on board) structure, such as, be installed to once on circuit board 32 by blue LED die.

[optics]

As shown in Figure 1, optics 4 is that plane is considered as circular plate-shaped member, and its central authorities are formed with the through hole 40 of toroidal.The size of optics 4 is almost identical with circuit board 32, covers the light-emitting component 31 of light source portion 3.The center of through hole 40 is consistent with the center of the center of the loading surface 21A of framework 2 and the through hole 30 of circuit board 32.The center of through hole 40 is also consistent with central shaft Z.Optics 4 is fixed on framework 2 by screw (not shown).

Be formed with multiple lens 41 at optics 4, each of multiple lens 41 is corresponding with each of multiple light-emitting components 31 being installed in circuit board 32.Optics 4 has linking part 42, linked, thus multiple lens 41 is integrated by this linking part 42 to two lens 41 adjacent one another are in multiple lens 41.That is, multiple lens 41 are integrally formed, thus form optics 4.Form according to this, can easily illumination apparatus 1 assemble.The resin that optics 4 such as has light transmission and electrical insulating property by polycarbonate resinoid, acrylic resin or polystyrene resins etc. is formed.

As shown in Figure 2A and 2B, at optics 4, each of multiple lens 41 has light entrance face 43 away form one another and light emergence face 45, and has the lens axis Ax2 intersected with light entrance face 43 and light emergence face 45.Lens axis Ax2 is orthogonal with the loading surface 21a of framework 2.That is, lens axis Ax2 is also orthogonal with the front 321 of circuit board 32.Further, lens axis Ax2 is positioned on identical axle with element optical axis Ax1.Further, lens axis Ax2 and element optical axis Ax1 is parallel with central shaft Z.

The light entrance face 43 of each of multiple lens 41 is relative with each of corresponding multiple light-emitting components 31.The light entrance face 43 of lens 41 has the flexure plane caved in the direction along lens axis Ax2.The light emergence face 45 of each of multiple lens 41 and corresponding multiple light entrance faces 43 each back to.The light emergence face 45 of lens 41 has the flexure plane caved in the direction along lens axis Ax2.The depression of light entrance face 43 is darker than the depression of light emergence face 45.

[cover]

As shown in Figure 1, the profile of cover 5 is the dome shape with opening, is toroidal, and has roughly identical with framework 2 diameter in plane apparent time.Cover 5 covers optics 4.The Center-to-Center axle Z of cover 5 is consistent.Cover 5 has multiple holding section (not shown) at its open end 53, is used for engaging with the cover installation portion 23 of framework 2.Engaged with cover installation portion 23 by these holding sections, thus cover 5 can be loaded and unloaded on framework 2.

As shown in Figure 3, in lighting device 1, cover 5 have the cover inner surface 52 relative with optics 4 and with cover inner surface 52 back to cover outer surface 51.The cover inner surface 52 of cover 5 is concave surface, and cover outer surface 51 is convex surface.That is, cover inner surface 52 and cover outer surface 51 with the distance of framework 2 are, more less towards periphery 513 from the central portion 511 of cover 5.The central portion 511 of cover 5 is provided with par, and this par is formed roughly parallel with framework 2.And be provided with rake 512, along with from par (central portion 511) towards periphery 513 with regulation angular slope.Form according to this, can make to penetrate and the angle θ 3 that the light (illustrating with dash-dot arrows illustration in Fig. 3) inciding rake 512 incides cover outer surface 51 diminishes from optics 4.Like this, the total reflection of this light on outside the cover surface 51 can be suppressed, thus the extraction efficiency of light can be improved.Further, the diagram of cross section hachure is eliminated in figure 3.

In cover 5, preferably form light diffusion layer 55, this light diffusion layer 55 is at least formed at least one party of cover inner surface 52 and cover outer surface 51.As shown in Figure 4 A, cover 5 and there is the base material 54 and the light diffusion layer 55 stacked in the outside (cover outer surface 51 of cover 5) of base material 54 that are made up of translucent resin.Such as acrylic resin or polystyrene resins can be used as base material 54.Cover 5 has the mechanical strength required when cover 5 being installed to framework 2 and taking off from framework 2.Light diffusion layer 55 is containing the light diffusion particle 56 spread light.As light diffusion particle 56, such as, can use titanium dioxide, silica or pottery.

The density of the light diffusion particle 56 comprised in light diffusion layer 55 is, higher than periphery at the central portion of the light diffusion layer 55 of cover 5.The light diffusing that the central portion 511 of the cover 5 that light diffusion particle 56 gathers has is higher than periphery 513.That is, at lighting device 1, the par (central portion 511) of cover 5 is high light diffusion part.By arranging high light diffusion part, the light inciding high light diffusion part is spread by light diffusion particle 56, thus can suppress the total reflection of the light of the cover outer surface 51 at cover 5.Like this, can increase and inject to outside light from high light diffusion part (central portion 511), therefore, it is possible to increase the irradiation brightness of the central portion of lighting device 1.

In cover 5, the transparent propene acid resin of base material 54 to be such as thickness be 1.5mm, the thickness of light diffusion layer 55 is such as 6 μm.In this is formed, cover 5 such as has the transmissivity of 67% and the diffusivity of 60% for the light of wavelength 555nm.In addition, when the general cover that the milky white resin of acrylic compounds by thickness being 1.5mm is formed, such as, light for wavelength 555nm has the transmissivity of 61% and the diffusivity of 61%.Compared with the cover that the cover 5 be made up of transparent acrylic resin is formed with by the milky white resin of acrylic compounds, diffusivity can not be made to reduce, and can transmissivity be improved.

With reference to Fig. 4 B to can replace lighting device 1 cover 5 variation in cover 5A be described.Further, except cover 5A, all identical with the formation of lighting device 1.

Cover 5A can have light diffusion layer 55A at the inner surface of base material 54A (the cover inner surface 52A of cover 5A).When the cover inner surface 52A of cover 5A has light diffusion layer 55A, preferably outside the cover surperficial 51A has small concaveconvex structure 58.Concaveconvex structure 58 is such as by carrying out blasting treatment to be formed to the outer surface of base material 54A.By arranging concaveconvex structure 58, therefore light can by concaveconvex structure 58 by irregular reflection, thus user is just difficult to when seeing cover 5A produce dazzling sensation, therefore, it is possible to improve the aesthetic property of lighting device.

In cover 5A, the transparent propene acid resin of base material 54A to be such as thickness be 1.5mm, the thickness of light diffusion layer 55A is 6 μm.In this case, cover 5A, such as the light of wavelength 555nm, has the transmissivity of 72% and the diffusivity of 53%.

[power supply]

Power supply 6 has the lamp circuit (not shown) for driving light-emitting component 31 lighting, is connected with commercial ac power source via power-feed connector (not shown) etc.Lamp circuit has the transformer, the electric capacity and control IC etc. that the alternating current from commercial ac power source are carried out to rectification, controls the power supply from commercial ac power source to light-emitting component 31 according to the instruction of user.Power supply 6 is embedded in the opening portion 22 of framework 2.Form according to this, lighting device 1 slimming can be made.

[lens]

Referring to Fig. 5 to Fig. 6, the lens 41 in optics 4 are described in detail.Fig. 5 shows the relation of θ 2/ θ 1 for the angle θ 1 in lens 41.Fig. 6 shows the distribution curve flux of the light penetrated from lens 41.

As shown in Figure 2A and 2B, lens 41 covering luminous element 31.Lens 41 have light entrance face 43, lens interior 44 and light emergence face 45, the light penetrated from light-emitting component 31 incides light entrance face 43, lens interior 44 is the regions of advancing in lens 41 from the light of light entrance face 43 incidence, and the light of advancing at lens interior 44 injects to the outside of lens 41 from light emergence face 45.To penetrate from light-emitting component 31 and the light inciding light entrance face 43 as incident light L0, light that incident light L0 is advanced in the inside of lens 41 as light L1 in lens, light L1 in lens is injected to the light of outside of lens 41 from light emergence face 45 as injection light L2.Further, using light L1 in lens relative to lens axis Ax2 travel angle as the first angle θ 1, will injection light L2 relative to the travel angle of lens axis Ax2 as the second angle θ 2.

Light emergence face 45 also has the first light emergence face 46 and the second light emergence face 47, first light emergence face 46 refers to, the region expanded in prescribed limit from the position intersected with lens axis Ax2, the second light emergence face 47 is the regions arranged continuously around the first light emergence face 46, with the first light emergence face 46.First light emergence face 46 is the level and smooth curved surfaces slightly caved in along the direction of lens axis Ax2, and the second light emergence face 47 is the level and smooth curved surfaces swelled outward.The cup depth of the first light emergence face 46 is less than the depression of light entrance face 43.

Light entrance face 43 is the flexure plane caved in along the direction of lens axis Ax2.Therefore, the light (in fig. 2b with the incident light L0 shown in dotted arrow) penetrated from light-emitting component 31 reflects, and the direction of refraction is, than at light entrance face 43 for the large direction of the angle of lens axis Ax2.The structure of lens 41 is prescribed according to the relation of the first angle θ 1 and the second angle θ 2.As shown in Figure 5, the value of the function f (θ 1) represented with θ 2/ θ 1, along with the increase of θ 1, reduces once increase is rear.In the scope of 20 °≤θ 1≤80 °, there is maximum at lens 41, θ 2/ θ 1.

Specifically, when θ 1 is 33 degree, θ 2/ θ 1 is maximum (1.70).The value of θ 2/ θ 1 is, roughly maintains 1.6 at θ 1 when the scope of 10 ~ 20 degree, increases to 1.70 (maximum) at θ 1 gradually when the scope of 20 ~ 30 degree, at θ 1 when the scope of 30 ~ 70 degree, reduces to 1 gradually.θ 2/ θ 1 has maximum in the scope of 30 °≤θ 1≤40 °.In the scope of 20 °≤θ 1≤70 °, become 1.0≤θ 2/ θ 1≤1.7.

Further, be in the scope of less than 10 degree at θ 1, the reason of the value change of θ 2/ θ 1 is, when θ 1 is little, and the cause that the impact of evaluated error on θ 2/ θ 1 of θ 1 is large.

Such as at lens 41, light L1 in lens on the angle direction of θ 1=10 degree, as injection light L2, penetrate from lens 41 with the angle direction of θ 2=16 degree (10 degree × 1.62), light L1 in lens on the angle direction of θ 1=20 degree, as injection light L2, penetrate from lens 41 with the angle direction of θ 2=33 degree (20 degree × 1.63).Equally, in lens, the angle direction of light L1 with the pass of the angle direction of injection light L2 is, when θ 1=33 spends, and θ 2=56 degree, when θ 1=40 spends, θ 2=66 degree, when θ 1=50 spends, θ 2=75 degree, when θ 1=60 spends, θ 2=72 degree, when θ 1=70 spends, θ 2=72 degree.

Like this, as shown in Figure 6, it is the direction of about 75 degree that the injection light L2 penetrated from lens 41 is irradiated to strongly relative to lens axis Ax2.Further, due to when θ 1 is in the scope of 10 ~ 30 degree, the value of θ 2/ θ 1 is less than maximum, therefore penetrates light L2 also directive lens axis Ax2 direction.

With reference to Fig. 7 to Fig. 9 to can replace with the lens 41 of optics 4, lens 41A in the variation of lens 41 is described.Further, identical with lighting device 1 except lens 41A.Fig. 7 is the sectional view of the lens 41A involved by variation of the lens 41 forming lighting device 1.Fig. 8 shows the relation of θ 2/ θ 1 relative to θ 1 in lens 41A.Fig. 9 shows the distribution curve flux of the light penetrated from lens 41A.

Lens 41A is compared with lens 41 (shown in the dotted line of Fig. 7), and the cup depth of the first light emergence face 46A is little, and the second light emergence face 47A protuberance is outward also little.

As shown in Figure 8, the value of θ 2/ θ 1 in lens 41A is 1.1≤θ 2/ θ 1≤1.7 in the scope of 20 °≤θ 1≤70 °.Specifically, the value of θ 2/ θ 1 in lens 41A is compared with lens 41, little in the scope of θ 1<60 degree, large in the scope of θ 1>60 degree.The value of θ 2/ θ 1 in lens 41A is more than 1.1 in the scope of 10 °≤θ 1≤80 °.In lens 41A, because the value of θ 2/ θ 1 in the scope of θ 1<33 degree is less than lens 41, therefore, it is possible to make the refraction angle penetrated to the light in lens axis Ax2 direction from light-emitting component 31 diminish.Therefore, increase from the light in lens 41A directive lens axis Ax2 direction.Further, at lens 41A, because the value of θ 2/ θ 1 in the scope of θ 1>60 degree is larger than lens 41, therefore, it is possible to make, from the light of light-emitting component 31 directive side, large refraction occurs.Such as, light L1 in the lens on the angle direction of θ 1=70 degree, as the angle direction of injection light L2 directive θ 2=84 degree.Therefore, the light of the side of directive lens 41A increases.

By this form, as shown in Figure 9, from lens 41A penetrate light (representing with solid line) compared with the light (being represented by dotted lines) penetrated from lens 41, the light in directive lens axis Ax2 direction is more.Further, more can the direction of angle that separates of directive and lens axis Ax2.Further, in fig .9, by the maximum luminosity of light penetrated respectively from lens 41, lens 41A, draw respectively as 1.0.From lens 41A irradiate light compared with the light irradiated from lens 41, what can irradiate is wider.

At lighting device 1, lens 41 can be replaced with lens 41A.From the tilted direction relative to lens axis Ax2 (such as, direction relative to lens axis Ax2 is 60 degree) when have employed the lighting device of lens 41A, compared with the lighting device 1 that have employed lens 41, the surrounding of lighting device is not easy dimmed.

[uniformity]

The uniformity with reference to Figure 10 A, Figure 10 B illumination apparatus 1 is described.Figure 10 A shows the uniformity of the light irradiated from the lighting device shown in Fig. 1.Figure 10 B shows the uniformity of the light irradiated from lighting device in the past.In lighting device 1, from the light that light-emitting component 31 penetrates, reflect at the light entrance face 43 of lens 41 and light emergence face 45.For this reason, the light penetrated from light-emitting component 31 is not only the frontal (lens axis Ax2 direction or assembly axis Z-direction) of directive lens 41, the side also having a large amount of light to inject to lens 41 to.Accordingly, be irradiated to the inner surface 52 of cover 5 widely from the light of light-emitting component 31 injection, thus injection luminous energy gets at the central portion 511 and periphery 513 that reach cover 5.That is, light can penetrate from the whole cover 5 of lighting device 1.Further, owing to being provided with high light diffusion part (central portion 511) and reflecting part 24, therefore, it is possible to increase the central portion 511 of cover 5 and the irradiation brightness of periphery 513 of lighting device 1.

Like this, as shown in Figure 10 A, compared with the lighting device in the past shown in lighting device 1 with Figure 10 B, can irradiate evenly light, therefore improve the aesthetic property of lighting device 1.

(his embodiment)

Then, with reference to Figure 11 A and Figure 11 B, the lighting device 1B involved by his embodiment is described.Lighting device 1B is different from the profile of lighting device 1, and plane apparent time is rectangular-shaped.

Be rectangular-shaped at lighting device 1B, light source portion 3B in plane apparent time.LED31 is configured to rectangular on rectangular-shaped circuit board 32B.Further, optics 4B is also rectangular-shaped in plane apparent time.Framework 2B is the casing of the rectangle on one face with opening, in the mode that can penetrate from this opening from the light of optics 4B to receive light source portion 3B and optics 4B.Further, the face of the inner side of framework 2B is reflecting part 24B.Cover 5B is rectangular flat shape, is kept by the framework 59 of rectangle.These framework 2B, light source portion 3B and optics 4B are incorporated in housing 7B.Housing 7B is the casing that a mask has the rectangle of opening, and the light from optics 4B penetrates from opening.Framework 2B, light source portion 3B and optics 4B are incorporated in housing 7B.

The opening of cover 5B is embedded in the opening of housing 7B and blocked by framework 59.From reflecting part 24B to the distance the distance of nearest light-emitting component 31, light-emitting component 31, be such as respectively from the distance of light-emitting component 31 to cover 5B and the bottom surface from framework 2B to the distance of cover 5B, 12.1 ~ 29.25mm, 15 ~ 60mm, 35.8mm and 37.1mm.

Even if also the effect same with above-mentioned lighting device 1 can be obtained at lighting device 1B.That is, from the cover 5B of lighting device 1B can penetrate evenly light, therefore improve the aesthetic property of lighting device 1B.

(other)

In each above-mentioned embodiment, variation, although have employed LED as light-emitting component 31, but be not limited by this.Such as, also laser diode, organic electroluminescence device, inorganic electroluminescence device etc. can be adopted as light-emitting component 31.

Further, as light-emitting component 31, although have employed blue LED die, but be not limited by this, such as, can adopt UV LED chip, red LED chips or green LED chip.Further, also can carry out multiple combination to utilize to the LED that these send the light of different colours.

As fluorophor, although have employed yellow fluorophor, but not limit by yellow fluorophor, such as, can adopt red-emitting phosphors or green-emitting phosphor etc.Further, also can carry out multiple combination to utilize to the fluorophor of the light sending different colours.

Further, the light penetrated from light-emitting component 31 not limit by white light.Such as, also can be the monochromatic light such as red, green, blue.

Further, as multiple light-emitting component 31, also can combine the light-emitting component 31 of the light sending different colours.Such as, also can the light-emitting component 31 sending color of sunshine be combined with the light-emitting component 31 sending bulb color.In this case, by changing the light output sending the light-emitting component 31 of the light of each color, thus also light modulation and toning can be carried out to the light penetrated from lighting device.

symbol description

1,1A, 1B lighting device

2 frameworks

21a loading surface

21b installed surface

22 opening portions

24 reflecting parts

3 light source portion

31 light-emitting components

32 circuit boards

4 opticses

41,41A lens

42 linking parts

43 light entrance faces

44 lens interior

45 light emergence faces

46 first light emergence faces

47 second light emergence faces

5,5A, 5B cover

51 cover outer surfaces

52 cover inner surfaces

511 central portions (par, high light diffusion part)

512 rakes

513 peripheries

55 light diffusion layers

56 smooth diffusion particles

58 concaveconvex structures

6 power supplies

Ax1 element optical axis

Ax2 lens axis

L0 incident light

Light in L1 lens

L2 penetrates light

θ 1 first angle

θ 2 second angle

Claims (12)

1. a lighting device, is characterized in that,

This lighting device possesses:

Circuit board;

Light-emitting component, is installed on described circuit board;

Framework, has loading surface, and loads described circuit board on described loading surface;

Optics, covers described light-emitting component; And

The cover of light transmission, covers described optics,

Described optics has lens, and described lens have light entrance face and light emergence face, and described lens have the lens axis intersected with described light entrance face and described light emergence face,

Described lens axis is orthogonal with described loading surface,

Described light entrance face has the flexure plane relative with described light-emitting component, and this flexure plane caves in along the direction of described lens axis,

Described light emergence face has the flexure plane opposing with the described plane of incidence, and this flexure plane caves in along the direction of described lens axis,

Will penetrate from described light-emitting component and the light inciding described light entrance face as incident light, using the light of described incident light when advancing in the inside of described lens as light in lens, light in described lens is injected to from described light emergence face described lens outside light as injection light, using light in described lens relative to described lens axis travel angle as the first angle θ 1, using described injection light relative to the travel angle of described lens axis as the second angle θ 2 time

θ 2/ θ 1 has maximum in the scope of 20 °≤θ 1≤80 °.

2. lighting device as claimed in claim 1, is characterized in that,

Described circuit board is mounted with multiple described light-emitting component,

Described optics is formed with multiple described lens, multiple described lens and multiple described light-emitting component one_to_one corresponding,

Described optics has linking part, is linked two lens adjacent one another are in multiple described lens by this linking part, thus makes multiple described lens integration.

3. lighting device as claimed in claim 1 or 2, is characterized in that,

Described framework has the reflecting part round described loading surface, and this reflecting part is given prominence to towards the direction of described cover.

4. lighting device as claimed in claim 1 or 2, is characterized in that,

Described cover has the light diffusion layer that described injection light is spread, and this light diffusion layer is at least formed in the side in cover inner surface and cover outer surface, and described cover inner surface is relative with described optics, described cover outer surface and described cover inner surface opposing.

5. lighting device as claimed in claim 4, is characterized in that,

Describedly cover on described cover outer surface there is small concaveconvex structure.

6. lighting device as claimed in claim 4, is characterized in that,

Described cover outer surface is convex form, and described cover inner surface is concave shape.

7. lighting device as claimed in claim 4, is characterized in that,

Described light diffusion layer contains the light diffusion particle that described injection light is spread.

8. lighting device as claimed in claim 7, is characterized in that,

The density of the described smooth diffusion particle contained by described light diffusion layer is high at the periphery of described light diffusion layer at the central portion ratio of described light diffusion layer.

9. lighting device as claimed in claim 1 or 2, is characterized in that,

θ 2/ θ 1 has maximum in the scope of 30 °≤θ 1≤40 °.

10. lighting device as claimed in claim 1 or 2, is characterized in that,

In the scope of 20 °≤θ 1≤70 °, become 1.0≤θ 2/ θ 1≤1.8.

11. lighting devices as claimed in claim 1 or 2, is characterized in that,

In the scope of 20 °≤θ 1≤70 °, become 1.1≤θ 2/ θ 1≤1.8.

12. lighting devices as claimed in claim 1 or 2, is characterized in that,

Described loading surface, at the rounded shape of plane apparent time, has opening portion at the central portion of described loading surface,

Be configured with power supply in the inside of described opening portion, the power supply of light-emitting component described in this power supply subtend controls.