CN102901015A - Illuminating apparatus - Google Patents
Illuminating apparatus Download PDFInfo
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- CN102901015A CN102901015A CN201210261889XA CN201210261889A CN102901015A CN 102901015 A CN102901015 A CN 102901015A CN 201210261889X A CN201210261889X A CN 201210261889XA CN 201210261889 A CN201210261889 A CN 201210261889A CN 102901015 A CN102901015 A CN 102901015A
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Abstract
The invention provides an illuminating apparatus, wherein a guiding efficiency of light beams emitted from a light-emitting element is high. The illuminating apparatus comprises a light source served by a plurality of semiconductor light-emitting elements, and is provided with a transparent cover integrally covering a substrate and the semiconductor light-emitting elements disposed on the surface of the substrate. And the part of the cover covering the semiconductor light-emitting elements is a hemisphere shape, with the semiconductor light-emitting elementing disposed approximately in the center.
Description
Technical field
The present invention relates to use semiconductor light-emitting elements as the lighting device of light source.
Background technology
In the existing lighting device, in order to protect charging part and semiconductor light-emitting elements (hereinafter referred to as light-emitting component), the substrate that light-emitting component will be installed with the cap assembly of light transmission covers.In this cap assembly, exist for being set up in parallel a plurality of light-emitting components along the shape that is set up in parallel direction and covers with the groove shape.
Patent documentation 1(TOHKEMY 2010-278266 communique for example) in a kind of cap assembly has been proposed, for a plurality of light-emitting components that are set up in parallel installation at substrate, with the cap assembly that substrate and a plurality of light-emitting component are covered together, cap assembly is had along the shape that is set up in parallel the groove that direction forms with being integrated.This mainly is warpage and the distortion that can reduce substrate.
Patent documentation 1: TOHKEMY 2010-278266 communique.
Summary of the invention
In the patent documentation 1, the cap assembly that makes light transmission is for for being set up in parallel a plurality of light-emitting components on substrate along the shape that is set up in parallel direction and covers with the groove shape, total reflection can occur in the part along the light beam of the length direction of groove from the light beam of light-emitting component outgoing, so the derivation efficient of light beam may variation.
The object of the present invention is to provide a kind of high lighting device of derivation efficient of the light beam from the light-emitting component outgoing.
In order to reach above-mentioned purpose, lighting device of the present invention is characterised in that, take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, cover the shape of the part of semiconductor light-emitting elements in the light transmission cover, be the semi-spherical shape take semiconductor light-emitting elements as approximate centre.
In addition, another lighting device of the present invention is characterised in that, take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, cover the shape of the part of each light-emitting component in a plurality of semiconductor light-emitting elements in the light transmission cover, be the semi-spherical shape take each light-emitting component as approximate centre.
In addition, another lighting device of the present invention is characterised in that, take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, in the light transmission cover to semiconductor light-emitting elements take the shape of several light-emitting components as one group of part that covers, for taking at the illuminating part center of several light-emitting components as the semi-spherical shape of approximate centre.
The present invention preferably, the thickness of semi-spherical shape section in the light transmission cover, with from the top of semi-spherical shape section to the end gradually the mode of thickening change smoothly.
The present invention preferably, adjacent semi-spherical shape section more than 2 exists in the situation of part of contact in the light transmission cover, the outer rim of the part of contact is positioned at the outside of radiation angle of the semiconductor light-emitting elements of the approximate centre that is in semi-spherical shape section.
The present invention preferably, the global shape of light transmission cover is about the central point point symmetry of light transmission cover.
The present invention preferably, with the part of the light transmission cover light receiver as remote controller signal.
According to the present invention, cover light-emitting component by using to cover as the light transmission of the semi-spherical shape of approximate centre with each light-emitting component, from the light beam of light-emitting component outgoing with respect to the face of above-mentioned light transmission cover with roughly normal direction incident, can avoid by the light beam behind the above-mentioned lid total reflection occuring to outside outgoing the time, so can realize having improved the lighting device of the derivation efficient of light beam.
In addition, according to the present invention, because form a plurality of semi-spherical shape, the rigidity of light transmission cover is improved, so can alleviate warpage and the distortion of substrate, above-mentioned light-emitting component is corrected to respect on the suitable position of above-mentioned light transmission cover, improves the adaptation of light-emitting component installation base plate and heat sink, realize the high lighting device of luminous efficiency of light-emitting component.
And then according to the present invention, the global shape by making the light transmission cover is about the central point point symmetry of above-mentioned light transmission cover, and the distortion in the time of can realizing moulding is less, productivity is covered preferably.
In addition, according to the present invention, the thickness of above-mentioned semi-spherical shape section, constitute with from the top of above-mentioned semi-spherical shape section to the end gradually the mode of thickening change smoothly, can realize the lighting device that light distribution angle is wider thus.
Description of drawings
Fig. 1 is the outside drawing of the lighting device of the embodiment of the invention.
Fig. 2 be the same lighting device dismounting the figure of state of lampshade.
Fig. 3 be the same lighting device dismounting the figure of state of light transmission cover.
Fig. 4 is the enlarged drawing of light-emitting component installation base plate shown in Figure 3.
Fig. 5 is the figure of the state of having removed the light-emitting component installation base plate of the lighting device of the embodiment of the invention.
Fig. 6 be the same lighting device dismounting the figure of state of heat sink.
Fig. 7 is the exploded perspective view of the same lighting device.
Fig. 8 is the enlarged drawing of light transmission cover shown in Figure 7.
Fig. 9 is the partial cross section figure of the lighting device of the embodiment of the invention.
Figure 10 is the partial cross section figure of the same lighting device.
Figure 11 is the partial cross section figure of the same lighting device.
Figure 12 is the enlarged drawing of the semi-spherical shape section of the same lighting device.
Figure 13 is the enlarged drawing of the semi-spherical shape section of the same lighting device.
Figure 14 is the enlarged drawing of the semi-spherical shape section of the same lighting device.
Figure 15 is the enlarged drawing of the semi-spherical shape section of the same lighting device.
Figure 16 is other embodiment of the same lighting device.
Figure 17 is the sectional view of the semi-spherical shape section of the same lighting device.
Figure 18 is the sectional view of the semi-spherical shape section of the same lighting device.
Figure 19 be the same lighting device dismounting the part enlarged drawing of state of heat sink.
Figure 20 is at the figure that the light-emitting component installation base plate is loaded the localization method under the state on the heat sink in the same lighting device of explanation.
Figure 21 is the sectional view of the roughly semi-spherical shape section of the same lighting device.
Figure 22 is the sectional view of the remote controller light receiver (remote control reception section) of the same lighting device.
Description of reference numerals
1 lighting device
2 lampshades
3 heat sinks
4 light transmission covers
5 lampshade installed parts
6 light-emitting component installation base plates
7 joints
8 semiconductor light-emitting elements (light-emitting component)
9 body bases
10 insulation boards
11 lighting circuit substrates
12 remote control reception element covers
13 remote control reception holes
14 utensil installation portions
15 wiring holes
16 power connection a
17 power connection b
18 semi-spherical shape sections
The part of 18a covering luminous element 8
19 power connection cover sections
20 splice housing sections
21 remote control reception sections
22 central points
The center of 23a, 23b, 23c, 23d illuminating part
The central shaft of 24 semi-spherical shape
25 symmetry axis
The outer rim of the part that contacts in the semi-spherical shape section of 26 adjacency
27 substrate-guided projections
28 substrate fastener a
29 front end openings
30 trapezoidal shape extrusion modling sections
31 semi-circular shape extrusion modling sections
32 punching molding sections (cutting the tongue forming part)
33 extrusion modlings and the linearity edge of the section of cutting off that forms
34 punching molding and the line part on the plane that forms
Straight line portion on the radial direction of the fan shape of 35 light-emitting component installation base plates 6
36 location divisions that form by pull and stretch processing
37 drum sections
38 escutcheon installation portions
The solid fixed part of 39 spiral shells
40 conical surfaces
41 power supply connectors
42 substrate fastener b
43 light-emitting components (safety lamp is used)
44 C are facial
45 remote control reception elements
The specific embodiment
Below use the structure of the lighting device of the description of drawings embodiment of the invention.This lighting device is arranged on building, mainly is on the ceiling surface in living room of general family, uses by being connected with external power source with the mounting adapter of the subsidiary house service utensils such as the ceiling box engaging of building and being fixed on the position of regulation.Fig. 1 watches the outside drawing that is arranged on this lighting device on the not shown ceiling surface from the below.Lampshade 2 be transparent, translucent or milkyly have light transmission, such as the parts of being made by resin materials such as acrylic resin or polystyrene.It mainly has the beam spread that makes from the light source outgoing, alleviates the user and dazzles the eyes sense when looking at lighting device straight, and the brightness in the room that is provided with lighting device is acted on uniformly.
Then, the exploded perspective view of expression lighting device 1 in Fig. 7, and use and decompose the corresponding Fig. 2 of level～Fig. 6 description architecture.Fig. 2 is the state of having removed lampshade 2.Lampshade tool for mounting 5 engagings that lampshade 2 is fixed on the heat sink 3 keep, and for example by lampshade 2 is rotated counterclockwise in a circumferential direction, the not shown fastener that protrusion can be arranged on the lampshade 2 unloads.After removing lampshade 2, can see and be arranged on aftermentioned such as the utensil installation portion 14 of the central authorities of the body base 9 that is formed by metallic plate etc., suspention section by claw-like that this part and above-mentioned mounting adapter are had engages, and is fixed on for example assigned position of the ceiling surface in living room.In addition, near above-mentioned utensil installation portion 14, be provided with the power supply connector 41 that is connected with aftermentioned lighting circuit substrate 11, by making above-mentioned power supply connector 41 and the joint engagement connection that is arranged on the above-mentioned mounting adapter, can be from the house service power supply of building.
At light-emitting component installation base plate 6 welding light-emitting components 8.Light-emitting component 8 is emergent light and heating when work, and the temperature of self can rise, along with temperature rising luminous efficiency can reduce, so need to arrange the suitable heat-sink unit that rises and be complementary with temperature.Therefore, use has formed the light-emitting component installation base plate 6 of copper foil pattern and solder mask at the aluminium sheet with insulating barrier or the high resin plate of thermal conductivity, and carry out heat conduction by the not shown cooling pad that on the back side of the not shown terminal of light-emitting component 8 and light-emitting component 8, arranges with light-emitting component installation base plate 6 driving fits ground etc., the heat transmission that light-emitting component 8 is sent or be dispersed on the light-emitting component installation base plate 6.And then, the area of dissipation of light-emitting component installation base plate 6 and thermal capacity are determined by its size, only using this light-emitting component installation base plate to be difficult to obtain in the situation of sufficient radiating effect, need to be by 6 driving fits of light-emitting component installation base plate being fixed on such as guaranteeing heat dispersion on the heat sink 3 that is formed by metallic plate etc.In the present embodiment, the preferred area that increases as far as possible heat sink 3, and from the preferred one-body molded manufacturing of the viewpoint of thermal conductivity, so as shown in Figure 5, be comprise surrounding not shown escutcheon installation portion 38 that the mode of the periphery of above-mentioned lampshade tool for mounting 5 and lampshade 2 arranges, by the integrated metal large component of punching press.In addition, such as Fig. 5～shown in Figure 7, heat sink 3 will cover with the lighting circuit substrate 11 that insulation board 10 spiral shells are fixed on the body base 9 admittedly, and lighting circuit substrate 11 is accommodated in the space that is surrounded by body base 9 and heat sink 3.Therefore, the light-emitting component installation base plate 6 of mounting can make area extend near the central portion of lighting device 1 on the heat sink 3, disposes light-emitting component 8 thereon, can make the brightness of light emitting source central portion of lighting device 1 even.
In addition, lighting circuit substrate 11 time can generate heat in work, so the atmosphere temperature in the space that is surrounded by body base 9 and heat sink 3 can rise.At this moment, when the small volume in above-mentioned space, can reduce from the effect that is installed in light-emitting component installation base plate 6 heat radiations on the heat sink 3, so that heat sink 3 become than with the fixing solid fixed part 39 of spiral shell of the body base 9 spiral shells shape of protrusion that---is that lighting device is installed on the below under the installment state of ceiling surface---to the direction away from body base 9, make it possible to guarantee the volume of the accommodation space of lighting circuit substrate 11.And then, because heat sink 3 is metallic plate punch forming manufacturings, so above-mentioned convex form is to have been connected the installed surface of light-emitting component installation base plate 6 and comprised the admittedly shape of the face of fixed part 39, lampshade tool for mounting 5 and escutcheon installation portion 38 of spiral shell by the conical surface 40.By the conical surface 40 is set, can increase the volume of accommodation space of above-mentioned lighting circuit substrate 11 and the area of heat sink 3, so the luminous efficiency of light-emitting component 8 is high, and the drawing and forming of heat sink 3 is good, can realize the lighting device that productivity ratio is good.
Light-emitting component installation base plate 6 is fixed on the heat sink 3 by a plurality of screws with light transmission cover 4, directly is screwed on the heat sink 3 by 1 screw but each light-emitting component installation base plate 6 is minimum before light transmission cover 4 is installed.For the solid operation of this spiral shell, be Figure 19 (a)～(d) and Figure 20 explanation with the part enlarged drawing of the X section of Fig. 4, Fig. 5, Fig. 5.At first, load light-emitting component installation base plate 6 with the substrate-guided projection 27 that is arranged on the heat sink 3 with being harmonious, above-mentioned guide protrusion 27 with and light-emitting component installation base plate 6 straight line portion adjacent one another are, be the mode that the slit between the straight line portion 35 on the radial direction of fan shape matches, be that extrusion modling section or 32 ones in punching molding (the cutting the tongue moulding) section of trapezoidal shape 30 or semi-circular shape 31 forms by the cross section.The height h of above-mentioned extrusion modling section or punching molding section shape, be set as less than the thickness of light-emitting component installation base plate 6, the light transmission cover 4 of installing after can not interfering with is if but be provided with gap shape (avoidance shape) at the counterpart of light transmission cover 4 then not limited by this.By these processing methods, in the situation of extrusion modling, can form the linearity edge 33 of the section of cutting off, in the situation of punching molding, can form the line part 34 on die-cut plane.Therefore, with shown in the example of Figure 19 (d), the situation that forms location division 36 by the pull and stretch processing that needs the R shape on making is compared, and light-emitting component installation base plate 6 can not ride on the R part shown in a section, can carry out more correct location.In addition, the straight line portion that above-mentioned guide protrusion 27 is arranged to and light-emitting component installation base plate 6 is adjacent one another are, be that slit between the straight line portion 35 on the radial direction of fan shape matches, so by making the light-emitting component installation base plate 6 that is positioned on the heat sink 3 just can finish positioning operation near the center position of heat sink 3, can successfully carry out afterwards the solid operation of spiral shell.In addition, 1 screw of each light-emitting component installation base plate 6 minimum usefulness is being carried out after direct spiral shell is affixed to operation on the heat sink 3, the joint 7, power connection a16, the power connection b17 that connect between the light-emitting component installation base plate 6 are connected, then the fixing light transmission cover 4 of spiral shell, because the dislocation of the light-emitting component installation base plate 6 that the rigidity etc. because of the wiring material of above-mentioned a plurality of joints causes can not occur, so can successfully carry out the solid operation of the spiral shell of light transmission cover 4, can boost productivity.
In the present embodiment, in the light-emitting component installation base plate 6,1 has power connection a16 and the power connection b17 that is connected with lighting circuit substrate 11, and 3 do not have above-mentioned 2 power connections.Power connection a16 is used for light-emitting component 8 supply powers to work when usually lighting, and power connection b17 is used for only as light-emitting component 43 supply powers of safety lamp work, but is not limited to this structure.Not shown distribution is connected with lighting circuit substrate 11 by the wiring hole 15 that is arranged on the heat sink 3 from above-mentioned 2 power connections.Fig. 6 is the stereogram of having removed the state that arranges of heat sink 3 rear expression lighting circuit substrates 11.Lighting circuit substrate 11 is positioned in such as on the insulation board 10 that is formed by the resin materials such as polypropylene with anti-flammability, spiral shell is fixed on admittedly such as on the body base 9 that is formed by metallic plate etc., and substrate fastener a28 and substrate fastener b42 on the outstanding outer rim that is arranged on insulation board 10 of its outer cause keep.Be provided with the remote control reception element 45 that is covered by remote control reception element cover 12 at lighting circuit substrate 11, receive the infrared signal from the not shown remote control unit of user's operation, carry out lighting accordingly control with signal.In addition, the front end opening 29 of the tubular of above-mentioned remote control reception element cover 12 is facing to the remote control reception hole 13 that is arranged on the heat sink 3, so that can arrive above-mentioned remote control reception element by the infrared remote controller signal of lampshade 2 and light transmission cover 4.In addition, as shown in Figure 3 and Figure 4, when light-emitting component installation base plate 6 was positioned on the heat sink 3, remote control reception hole 13 was configured in the part that is clipped by the C face 44 of the profile of the light-emitting component installation base plate 6 of adjacency.
About the configuration in remote control reception hole 13, for example can in the perforate of the optional position of light-emitting component installation base plate 6, restrict but can produce the configuration of light-emitting component 8 on substrate, so preferably as described in present embodiment, be arranged on outside the light-emitting component installation base plate 6.In addition, such as also can receiver hole being set in the conical surface 40 grades of heat sink 3, although this is in outside the light-emitting component installation base plate 6, in this situation, need in addition to cover the cover of this receiver hole.This remote control reception hole 13, opening is from being to have reduced the light-emitting area on the face of height sum of the height of light-emitting component 8 and light-emitting component installation base plate 6 above the light-emitting component 8, because be positioned at the outside of the radiation angle of light-emitting component 8, so be not easy to be subject to the impact of the light beam of self-emission device 8, can improve the receptivity of remote controller signal.
Then, the outside drawing of expression light transmission cover 4 in Fig. 8.In these parts, semi-spherical shape section 18, power connection cover section 19, splice housing section 20, remote control reception section 21 have been formed.In the present embodiment, in remote control reception section 21, be formed be formed on heat sink 3 on the projection of the tubular that engages of remote control reception hole 13, be used for the location in the solid operation of spiral shell of light transmission cover 4, but be not limited to this shape, for example also can be simple plane.In addition, what can make remote control reception section 21 is shaped as semi-spherical shape with can optically focused, perhaps also can for example implement surface texturing processing (grain finish) to the surface of this part and come the reflection of Inhibitory signal with further raising receptivity.
In addition, in the present embodiment, make the integral plane of light transmission cover 4 be shaped as circle, constitute parts integral body about its central point 22 point symmetries, but also can constitute equally positive even numbers limit shape.In the present embodiment, when installation exercise, can need not to consider 4 kinds of installation directions of light transmission cover 4 for the mounting of light transmission cover, so can shorten the activity duration, and can eliminate the such undesirable element of installation direction mistake of parts, distortion when being the point symmetry shape and can reducing moulding can be boosted productivity in addition.
Semi-spherical shape section 18 cover 1 light-emitting component 8 or with a plurality of light-emitting components 8 as one group of coverings, expression light-emitting component 8 is the sectional view in 1 the situation among Figure 10, represents the enlarged drawing of the semi-spherical shape section 18 in this situation among Figure 13.In the present embodiment, the central shaft 24 of semi-spherical shape section 18 is set to consistent with the center 23b of illuminating part.The center 23b of the illuminating part in this situation is consistent with the center of light-emitting component 8.The refractive index of light transmission cover 4 has the large certain refractive index of refractive index (about 1.00) than air, so when from the light beam of light-emitting component 8 outgoing with respect to the normal of semi-spherical shape section 18 during with angle θ i incident, the angle θ o of light beam during from 18 outgoing of semi-spherical shape section has critical angle θ c, and this critical angle θ c is different because of the material of light transmission cover 4.For example typical value is that Merlon has refractive index, acrylic resin about 1.59 and has refractive index about 1.49, so critical angle θ c is about 39 °～42 °.Light beam from light-emitting component 8 outgoing of the approximate centre that is positioned at semi-spherical shape section 18, with respect to semi-spherical shape section 18 from roughly normal direction incident, it is abundant little value that θ o compares with above-mentioned critical angle θ c, so can avoid causing with interface, the outside generation total reflection of air at light transmission cover 4 reduction of light beam derivation efficient.
Then, expression light-emitting component 8 is the sectional view in 2 the situation in Fig. 9, the enlarged drawing of the semi-spherical shape section 18 in Figure 12 in this situation of expression.The central shaft 24 of semi-spherical shape section 18 is set to consistent with the center 23a of illuminating part.The center 23a of the illuminating part in the present embodiment is the point of bisection of line segment that connects the central point of 2 light-emitting components 8.In the situation of using semi-spherical shape section 18 to cover take a plurality of light-emitting components 8 more than 2 as one group, the distance between centers of preferred each light-emitting component 8 is fully little with respect to the diameter of semi-spherical shape section 18, but thermal diffusivity reduces such restriction when having the size constrained in the situation that increases semi-spherical shape section 18 and reducing one group of distance between centers between the light-emitting component 8.But, distance between centers by suitably setting above-mentioned 2 light-emitting components 8 and the diameter of semi-spherical shape section 18, so that be no more than above-mentioned critical angle θ c from the θ o that changes with incidence angle θ i of the light beam of each light-emitting component 8 outgoing of being covered by semi-spherical shape section 18, can access with light-emitting component 8 is the same effect of 1 situation.
In addition, Figure 14 represents to set the situation of 3 light-emitting components 8 point-blank.The center of light-emitting component 8 that is positioned at central authorities in the center 23c of the illuminating part in the present embodiment and 3 light-emitting components 8 that uniformly-spaced arrange is consistent, except this condition with above-mentioned identical take 2 light-emitting components 8 as one group situation.And then the mode that expression makes 3 light-emitting components 8 become the summit of equilateral triangle in Figure 15 disposes the situation of light-emitting component.The center 23d of the illuminating part in this situation is the center of gravity of above-mentioned equilateral triangle.According to present embodiment, compare with the situation that sets light-emitting component 8 point-blank, can reduce the diameter of semi-spherical shape section 18.
Below having represented for example to set in 1 semi-spherical shape section 18 situation of 1～3 light-emitting component 8, also is same in the situation of further accelerating.Namely, constitute the summit and the inside thereof that a plurality of light-emitting components 8 are disposed at regular polygon, and make this polygonal center of gravity consistent with the central shaft 24 of semi-spherical shape section 18, and, suitably set the distance between centers of above-mentioned a plurality of light-emitting component 8 and the diameter of semi-spherical shape section 18, different critical angle θ c can access same effect thus with the material of light transmission cover 4 so that from being no more than by the θ o with incidence angle θ i variation of the light beam of each light-emitting component 8 outgoing of semi-spherical shape section 18 coverings.
And then the part 18a that has represented for example to cover a plurality of light-emitting components 8 in Figure 16 is the situation that has the semicircular cylinder shape of 1/4 ball shape at two ends.Present embodiment is that same with the situation of semi-spherical shape, the center 23c that constitutes illuminating part is consistent with the symmetry axis 25 of the part 18a of covering luminous element 8 take a plurality of light-emitting components 8 of point-blank equally spaced setting as one group of situation about covering.But along with drum section 37 is elongated, the light beam that is configured in light-emitting component 8 outgoing at two ends from the center 23c away from illuminating part increases with respect to the incident angle θ i of drum section 37.Therefore, can cause θ o above critical angle θ c and total reflection occurs, the derivation efficient of light beam can reduce.Thereby, in the present embodiment, shorten as far as possible in order to make semicircular cylinder shape section 37, need to adopt to make the distance between centers of a plurality of light-emitting components 8 shorter, and the setting such as the diameter of 1/4 ball shape at two ends part is larger.
In addition, take above-mentioned a plurality of light-emitting components 8 as one group, with semi-spherical shape section 18 or have at two ends in the situation that the part 18a of covering luminous element 8 of the semicircular cylinder shape section of 1/4 ball shape covers, also can consist of (one group) by the different light-emitting component 8 of enough illuminant colours.
Then, in Figure 17, there is sectional view in the situation of the part that contacts with each other in a plurality of semi-spherical shape section 18 of expression adjacency.From the light beam of light-emitting component 8 with the irradiation angle outgoing of the characteristic of light-emitting component 8, incide semi-spherical shape section 18.As described in present embodiment, in the semi-spherical shape section 18 of adjacency, exist in the situation of part of contact, preferably make the outer rim 26 of the part of contact in the semi-spherical shape section 18 of adjacency be positioned at the outside of the irradiation angle of each light-emitting component 8 of arranging of consistent mode roughly with the center 23a of the central shaft 24 of each semi-spherical shape section 18 and illuminating part.The outer rim 26 that has represented for example the part of contact in the semi-spherical shape section 18 of adjacency in Figure 18 is positioned at the situation of inboard of the irradiation angle of each light-emitting component 8.In this situation, light beam from light-emitting component 8 outgoing, part that can be by contact in the semi-spherical shape section 18 to be inciding the semi-spherical shape section 18 of adjacency than wide-angle, so θ o surpasses critical angle θ c and total reflection occurs, can think thus the derivation Efficiency Decreasing of light beam.
Other embodiment in the cross section of expression semi-spherical shape section 18 in Figure 21 (b).Present embodiment is the misalignment by the radius of curvature R o in the center of the radius of curvature R i of the inboard that makes semi-spherical shape section 18 and the outside, and makes near the thickness t E example larger than near the thickness t V the top in end of semi-spherical shape section 18.Compare with the situation of Figure 21 (a) of even thickness, because large with respect to the incidence angle θ o change at the interface, the outside of semi-spherical shape section 18 from the light beam of light-emitting component 8 outgoing, so can make light beam expand wider scope to, but need to make θ o less than critical angle θ c in this situation.The thickness of the semi-spherical shape section 18 in the light transmission cover 4, with from the top of semi-spherical shape section 18 to the end gradually the mode of thickening change smoothly.Figure 21 (c) is near the thickness t E example less than near the thickness t V the top the end that makes on the contrary in the semi-spherical shape 18.Herein, the end refers near the cutting portion of semi-spherical shape section 18.In this situation, with above-mentioned opposite, θ o diminishes, and light beam is gathered in the narrower range.And then Figure 21 (d) makes inboard hemisphere, the outside example for the cubic surfaces such as a part of face parabolic or that generated by the rotary body of ellipse that is.In this situation, also can control by the relation of near the thickness t V the top of semi-spherical shape 18 and near the thickness t E the end convergence and the diffusion of light, the situation of the center of this point and the radius of curvature R i of the described inboard that makes semi-spherical shape section 18 before and the misalignment of lateral curvature radius R o is identical.In addition, make the inboard cubic surfaces such as a part for face parabolic or that generated by the rotary body of ellipse, situation that the outside is hemisphere also identical.As previously discussed, make the varied in thickness of semi-spherical shape section 18, control can access and the corresponding light distribution property of the purpose of lighting device the incidence angle θ o at the interface, the outside of semi-spherical shape section 18.
Then, represent for example the size of the light transmission cover 4 in the present embodiment, external diameter φ is 395mm, and the thickness of resin is 1.5mm, and the height of semi-spherical shape section is 12mm.In addition, as shown in Figure 8, power connection cover section 19, splice housing section 20 and semi-spherical shape section 18 etc. form more than 100 altogether on whole of light transmission cover 4.Therefore, had with the situation of simple even shape by photosensitiveness lid 4 and compare higher rigidity, admittedly be fixed on the heat sink 3 by making light transmission cover 4 spiral shell on the light-emitting component installation base plate 6, can alleviate warpage and the distortion of light-emitting component installation base plate 6.In addition, because light-emitting component 8 is corrected to respect on the suitable position of light transmission cover 4, and improved the adaptation of light-emitting component installation base plate 6 with heat sink 3, so the thermal diffusivity raising, can realize light-emitting area evenly and the higher lighting device of luminous efficiency of light-emitting component 8.
As described above, according to present embodiment, by using with light transmission cover 4 covering luminous elements 8 of each light-emitting component as the semi-spherical shape of approximate centre, the light beam that sends from light-emitting component 8 with respect to the face of above-mentioned light transmission cover 4 with roughly normal direction incident, can avoid light beam that total reflection occurs during to outside outgoing by light transmission cover 4, can realize having improved the lighting device of the derivation efficient of light beam.
In addition, according to present embodiment, by forming a plurality of semi-spherical shape section 18, the rigidity of light transmission cover 4 is improved, so can alleviate warpage and the distortion of light-emitting component installation base plate 6.In addition, because light-emitting component 8 is corrected to respect on the suitable position of light transmission cover 4, and improved the adaptation of light-emitting component installation base plate 6 with heat sink 3, so the thermal diffusivity raising, can realize light-emitting area evenly and the higher lighting device of luminous efficiency of light-emitting component 8.
And then according to present embodiment, the global shape by making light transmission cover 4 can be realized the cover that productivity ratio is good about the central point point symmetry of above-mentioned light transmission cover 4.
And then, according to present embodiment, the thickness by making semi-spherical shape section 18 with from the top of semi-spherical shape section 18 to the end gradually the mode of thickening change smoothly, can realize the lighting device that light distribution angle is wider.
Claims (7)
1. lighting device is characterized in that:
Take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that the described a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, cover the shape of the part of described semiconductor light-emitting elements in the described light transmission cover, be the semi-spherical shape take described semiconductor light-emitting elements as approximate centre.
2. lighting device is characterized in that:
Take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that the described a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, cover the shape of the part of each light-emitting component in described a plurality of semiconductor light-emitting elements in the described light transmission cover, be the semi-spherical shape take described each light-emitting component as approximate centre.
3. lighting device is characterized in that:
Take a plurality of semiconductor light-emitting elements as light source, have substrate and be installed in the light transmission cover that the described a plurality of semiconductor light-emitting elements on the substrate surface cover integratedly, in the described light transmission cover to described semiconductor light-emitting elements take the shape of several light-emitting components as one group of part that covers, for taking at the illuminating part center of described several light-emitting components as the semi-spherical shape of approximate centre.
4. such as the described lighting device of any one in the claim 1～3, it is characterized in that:
The thickness of semi-spherical shape section in the described light transmission cover, with from the top of described semi-spherical shape section to the end gradually the mode of thickening change smoothly.
5. such as the described lighting device of any one in the claim 1～4, it is characterized in that:
Adjacent semi-spherical shape section more than 2 exists in the situation of part of contact in described light transmission cover, and the outer rim of the part of described contact is positioned at the outside of radiation angle of the semiconductor light-emitting elements of the approximate centre that is in described semi-spherical shape section.
6. such as the described lighting device of any one in the claim 1～5, it is characterized in that:
The global shape of described light transmission cover is about the central point point symmetry of described light transmission cover.
7. such as the described lighting device of any one in the claim 1～6, it is characterized in that:
With the part of the described light transmission cover light receiver as remote controller signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-162760 | 2011-07-26 | ||
| JP2011162760A JP5639543B2 (en) | 2011-07-26 | 2011-07-26 | Lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102901015A true CN102901015A (en) | 2013-01-30 |
| CN102901015B CN102901015B (en) | 2015-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210261889.XA Expired - Fee Related CN102901015B (en) | 2011-07-26 | 2012-07-26 | Illuminating apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5639543B2 (en) |
| CN (1) | CN102901015B (en) |
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| CN103672637A (en) * | 2013-12-04 | 2014-03-26 | 黄善国 | Novel LED ceiling lamp capable of emitting light evenly and all-directionally |
| CN106062473A (en) * | 2014-03-06 | 2016-10-26 | 京瓷连接器株式会社 | Lighting apparatus |
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| JP6112395B2 (en) * | 2013-02-13 | 2017-04-12 | パナソニックＩｐマネジメント株式会社 | lighting equipment |
| JP6043676B2 (en) * | 2013-04-26 | 2016-12-14 | 日立アプライアンス株式会社 | LED lighting device |
| JP6355048B2 (en) * | 2014-10-09 | 2018-07-11 | パナソニックＩｐマネジメント株式会社 | lighting equipment |
| JP6271755B2 (en) * | 2014-10-20 | 2018-01-31 | シャープ株式会社 | Light emitting module |
| JP6486726B2 (en) * | 2015-03-10 | 2019-03-20 | シチズン時計株式会社 | Light emitting module |
| JP6551703B2 (en) * | 2017-11-28 | 2019-07-31 | 東芝ライテック株式会社 | lighting equipment |
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Also Published As
| Publication number | Publication date |
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| CN102901015B (en) | 2015-07-15 |
| JP2013026588A (en) | 2013-02-04 |
| JP5639543B2 (en) | 2014-12-10 |
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