CN100510518C - Illumination unit and illumination apparatus - Google Patents

Illumination unit and illumination apparatus Download PDF

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Publication number
CN100510518C
CN100510518C CNB200580016064XA CN200580016064A CN100510518C CN 100510518 C CN100510518 C CN 100510518C CN B200580016064X A CNB200580016064X A CN B200580016064XA CN 200580016064 A CN200580016064 A CN 200580016064A CN 100510518 C CN100510518 C CN 100510518C
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China
Prior art keywords
light
light emitting
emitting diode
reflection part
lighting unit
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CNB200580016064XA
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Chinese (zh)
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CN1965195A (en
Inventor
平塚利男
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MIRAI KK
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MIRAI KK
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Publication of CN1965195A publication Critical patent/CN1965195A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

An illumination unit and an illumination apparatus is provided, which can provide, while saving electric energy, an illumination area with high illumination intensity and specific flat illumination intensity distribution and which can extend the distance of illumination. An illumination unit 100 using light emission diodes 17 as the light emission source. The illumination unit has a light emission section where the light emission diodes 17 are arranged on a base 19, a first reflection section 25 that is arranged on the light exit side of the light emission section so as to correspond to the individual light emission diodes 17 and that substantially parallelly reflects rays of light from the light emission diodes 17 toward the light exit side, and a second reflection section provided further on the light emission side of the first reflection section 25 and substantially parallelly reflecting, toward the light exit side, that portion of the rays of light from the light emission diodes 17 which does not enter in the first reflection section 25.

Description

Lighting unit and lighting apparatus
Technical field
The present invention relates to the lighting unit and the lighting apparatus that comprise this lighting unit of a kind of LED of use as light source.
Background technology
As conventional lighting apparatus, use various types of lighting sources such as fluorescent lamp, incandescent lamp and spotlight.But, comprise the ultraviolet ray that damages illuminated target from the illumination light of this lighting source, or this lighting source is because the generation of heat has the restriction of installation.Consider such as CO 2The environmental problem that reduces wishes that light source has as far as possible little power consumption.Recently, a kind of little heat that produces causes sizable concern with the led light source with low power consumption, and a kind of white light LEDs with high brightness also is provided.Therefore, the purposes of the led light source in the general lighting equipment is increased.Because LED has high brightness and higher calorific value, is fit to for power consumption.But because LED does not comprise ultraviolet ray or infrared ray, so it damages irradiated target hardly.The example of this class lighting apparatus is disclosed in JP-A-2000-021209.
[patent documentation 1] JP-A-2000-021209
Summary of the invention
The problem that the present invention solves
But even this LED has high directivity, but the illuminance of the direct light that is obtained by this LED distributes along with irradiation distance increases and broadens.In addition, because irradiated region is strengthened excessively, it is inadequate that illuminance becomes.Figure 34 A shows when not being provided with reflecting surface as the luminous LED 81 of monomer, and the lip-deep illuminance at the preset distance place distributes.When at the preset distance place, when luminous from the teeth outwards, under low-light level, obtain wide light and distribute, shown in Figure 34 A as the LED 81 of monomer.Therefore, proposed in led light source, to be provided with the structure of reflecting surface.But although reflecting surface will point to the side of led light source or the light at the back side returns the front side, reflecting surface has excellent light focus characteristics hardly.In addition, illuminance distributes and also can be broadened, and unnecessary zone may be illuminated.Because this environment, the light source with high brightness are used for obtaining that need and enough illuminances.In order to limit, cut off unnecessary light by light shielding part such as shutter with irradiated zone.
But higher source luminance is used a large amount of electrical power, with and size also be big.Therefore, in the time of on being installed in lighting apparatus, this light source has many constraints, with and range of application be limited.In addition, light shielding part such as shutter may reduce the light service efficiency, therefore still stay many problems to be solved.
Usually,, need a kind of light source, under high illuminance, obtain to have the surround that smooth illuminance distributes by this light source as lighting source.Shown in Figure 34 B, the reflecting plate 83 with recessed parabolic surface is set in the side of LED 81 (or rear side).Then, from plate 83 collimations (collimate) that are reflected of the light of LED 81, increase pharosage thus.Can also extend the reached distance of light by this reflecting plate.In addition,, be not radiated at the front side that light component 86 on the reflecting plate 83 continues to light path, be scattered simultaneously although be transmitted into plate 83 deflections that are reflected of the light component of LED81 side.Therefore,, still show wide distribution, under the high illuminance that illumination needs, sufficiently obtain to have the surround of smooth illuminance distribution although distribute by the illuminance of reflecting plate 83 raising illuminances.In addition, when LED81 with little light angle as 10 ° when luminous, be not irradiated onto on the reflecting plate 83 from the light of LED 81 emissions, the component that is not deflected basically increases, so that can not expect to improve illuminance.
Consider the reached distance of using lens to extend light.But, arrange that lens increase the number of parts, increase cost thus, assembly performance is lowered, and need be such as the operation bidirectional of adjusting optical axis etc.Thus, realizing in the lighting apparatus many difficulties being arranged with low cost.
Advantage of the present invention is that it provides a kind of lighting unit, by this lighting unit, when high illuminance, obtain to have the surround that constant smooth illuminance distributes, save electrical power simultaneously, and can extend illumination and penetrate distance, do not produce in the surround and to be a bit darkish in color or shade, and a kind of lighting apparatus that comprises this lighting unit is provided.
The method of dealing with problems
(1), according to a first aspect of the invention, a kind of lighting unit that uses light emitting diode as light source comprises the luminescence unit with a plurality of light emitting diodes of arranging on pedestal; Corresponding to first reflection part that each a plurality of light emitting diodes on the light emission side of luminescence unit are provided with, each first reflection part has parabolic surface, and the focal position of this parabolic surface is the light-emitting area of light emitting diode; And a pair of second reflection part, the arranged direction that is parallel to the light emitting diode on the light emission side of first reflection part that passes light emitting diode is arranged, each second reflection part has the reflecting surface of plate shape, and the light of the diode of self-luminous in the future is towards the direction reflection of emission side.
According to this lighting unit, the light of first reflection part self-luminous in the future diode is towards the reflection of emission side direction, and the light of second reflection part self-luminous in the future diode reflects towards the emission side direction.Then, when electrical power is saved, under high illuminance, can obtain uniform illuminance and distribute, and can extend irradiation distance.
When from the light of light emitting diode by the first reflection part reflex time, the reflection cross section of first reflection part is a parabolic surface, can high accuracy produce directional light, improves illuminance thus.
When from the light of light emitting diode by the second reflection part reflex time, the reflecting part of second reflection part forms plate shape, can make the sharpness of border of catoptrical range of exposures.
In addition, right, so that concentrated, to increase illuminance from the light of two reflectings surface perpendicular to intersecting reflecting surface that this plate shape is set on the direction of arranged direction of light emitting diode of first reflection part.
(2), in the lighting unit of (1), be set as first boundary line when what launch from the luminous flux of light emitting diode and the boundary line between its shade on second reflection part from first reflection part, and when being set as second boundary line from the boundary line between the luminous flux of other light emitting diode that is adjacent to this light emitting diode and its shade on second reflection part, second reflection part protrudes into height in the emission side and is set as the point that is higher than on second reflection part that first and second boundary lines wherein intersect for the first time.
According to this lighting unit, the height of second reflection part be set as be higher than from the luminous flux of first reflection part emission and first boundary line between its shade on second reflection part and from another luminous flux of adjacent light emitting diode and the point that second boundary line between its shade on second reflection part intersects for the first time.Then, when the luminous flux that do not shine on second reflection part in the surface that is being arranged in second reflection part from light emitting diode, the generation shade does not reach (propagation) on the emission side that exceeds second reflection part.Being a bit darkish in color or shade of the illumination light that produces when thus, not producing shade and export with luminous flux.
(3), according to a second aspect of the invention, a kind of lighting unit that uses light emitting diode as light source comprises the luminescence unit with a plurality of light emitting diodes of arranging on pedestal; Corresponding to first reflection part that each a plurality of light emitting diodes on the light emission side of luminescence unit are provided with, each first reflection part is formed by parabolic surface, and its focal position is the light-emitting area of light emitting diode; And on the emission side of first reflection part, having second reflection part of plate shape reflecting surface, the light of this plate shape reflecting surface self-luminous in the future diode is towards the direction reflection of emission side.Be set as first boundary line when what launch from the luminous flux of light emitting diode and the boundary line between its shade on second reflection part from first reflection part, and when being set as second boundary line from the boundary line between the luminous flux of other light emitting diode that is adjacent to this light emitting diode and its shade on second reflection part, second reflection part protrudes into height in the emission side and is set as the point that is higher than on second reflection part that first and second boundary lines wherein intersect for the first time.
According to this lighting unit, the light of first reflection part self-luminous in the future diode is towards the reflection of emission side direction, and the light of second reflection part self-luminous in the future diode reflects towards the emission side direction.Then, when electrical power is saved, under high illuminance, can obtain uniform illuminance and distribute, and can extend irradiation distance.In addition, the height of second reflection part be set as be higher than from the luminous flux of first reflection part emission and first boundary line between its shade on second reflection part and from another luminous flux of adjacent light emitting diode and the point that second boundary line between its shade on second reflection part intersects for the first time.Then, the shade that produces when the luminous flux that do not shine on second reflection part in the surface that is arranged in second reflection part from light emitting diode does not reach on the emission side that (propagation) exceed second reflection part.Being a bit darkish in color or shade of the illumination light that produces when thus, not producing shade and export with luminous flux.
(4), in the lighting unit of (3), in a plurality of row, arrange a plurality of light emitting diodes, and in two outsides of the arranged direction of a plurality of light emitting diode lines, right with respect to the arranged direction of the light emitting diode in the light emitting diode lines second reflection part that is arranged in parallel.
According to this lighting unit, the light that directly is incident on second reflection part from light emitting diode is focused on by two reflectings surface of the second reflection part centering, so that increase illuminance.
(5), in the lighting unit of (4), with zigzag graphical layout light emitting diode lines, in the line direction between adjacent light emitting diode lines, the arrangement pitch of first reflection part in the light emitting diode lines changes 1/2 spacing.
According to this lighting unit, between adjacent light emitting diode lines with zigzag graphical layout first reflection part.Therefore, can in position adjacent to each other, arrange first luminescence unit, wherein not shine from the shade of the light of first reflection part emission and be reduced, and suppress being a bit darkish in color or shade of the illumination light that produces by shade.
(6), in the lighting unit of (4) or (5), between light emitting diode lines and another light emitting diode lines of being adjacent, in light emission direction, the light emitting diode between each row has step.
According to this lighting unit, the boundary line of one top-cross fork drift angle (for example, first boundary line) step by an adjacent light emitting diode (with the step in the direction of retreat of light emission direction opposite side) moves towards the direction of light emitting diode is parallel, reduce to be sandwiched in the leg-of-mutton basically shade between first and second boundary lines thus, so that be formed on the surface of second reflection part.That is along with shade is reduced, the color shading or the shade that suppress illumination light produce.
(7), in any one lighting unit of (1) to (6), the reflecting surface of first and second reflection parts is formed by the minute surface by evaporation coating.
According to this lighting unit,, for example,, process reflecting surface by the sputter electroplating work procedure by the coating operation of evaporation.The sputter electroplating work procedure comprises priming coat, the aluminum evaporation in the vacuum of the special-purpose prime paint of coating (primer) and the transparent coating of urethane (urethane) that enters the aluminum evaporation face.Even treating on the complex surface of deposit, such as the parabolic surface of naval stores, also can form uniform minute surface, and can form reflecting surface with high reflectance.
(8), in any one lighting unit of (1) to (6), at least one reflecting surface of first and second reflection parts is by smooth processing.
According to this lighting unit, in wide in range perspective view, looked like mirroring, but in the perspective view of microcosmic, be diffuse reflection by the light of smooth processing reflecting surface reflection.As a result, is disperseed light mixed with different frequency (waveform) component that separates color.
(9), in any one lighting unit of (1) to (8), light emitting diode is to have blue light-emitting diode and will change the white light-emitting diode of the fluorescent material of gold-tinted component from the blue light components of this blue light-emitting diode into.
According to this lighting unit, if absorbed by fluorescent material from the blue light of blue light diode emission, fluorescent material is launched gold-tinted so, and this gold-tinted and non-absorbent blue light.Then, the emission light from light emitting diode becomes white light.
(10), according to a third aspect of the invention we, a kind of lighting apparatus that comprises according to any one lighting unit of (1) to (9); And the driver element that is provided for driving the electrical power of this lumination of light emitting diode.
According to this lighting apparatus, if source power supply is provided for driver element, driver element provides driving power to light emitting diode so.Then, light emitting diode is driven, and with in high illuminance with in that uniformly illuminance is luminous under distributing, electrical power is saved simultaneously.
Advantage of the present invention
According to this lighting unit and lighting apparatus, electrical power can be saved, and can obtain to have the surround that constant smooth illuminance distributes under high illuminance, and can extend irradiation distance.Therefore, can improve the energy efficiency of light, reduce significantly thus the influential CO of environment 2Discharge.In addition, can prevent that the color shading of illumination light or shade from producing, and has high-quality even illumination so that can carry out.
Description of drawings
Fig. 1 shows the structure chart according to first embodiment of lighting apparatus of the present invention.
Fig. 2 A illustrates the side view of lighting unit, and Fig. 2 B is its bottom view.
Fig. 3 illustrates the decomposition diagram of luminescence unit.
Fig. 4 is the profile of lighting unit shown in Figure 2, A-A along the line.
Fig. 5 shows the curve map by the illumination profile of this lighting unit.
Fig. 6 shows when LED is switched on, the explanatory of the state of the reflector parts of seeing from emission side.
Fig. 7 is according to having or lack reflecting surface or its kind, checks the emission brightness of light source and the notion curve map by the relation between the light source distance of lighting unit.
Fig. 8 shows the relative intensity of relative spectral power distribution and the correlation curve between the waveform.
Fig. 9 shows the profile that second reflection part protrudes into the height in the emission side.
Figure 10 shows the explanatory view on the surface of the illumination unit with second reflection part, and it highly is set as the H of Fig. 9 M
Figure 11 A schematically shows the explanatory of irradiates light of the present invention, and Figure 11 B and 11C schematically show the explanatory of the irradiates light of comparative example.
Figure 12 is the perspective view according to the lighting unit of second embodiment, and wherein reflecting surface is formed by smooth finished surface.
Figure 13 illustrates the profile of reflector parts shown in Figure 10.
Figure 14 shows the explanatory by the illumination profile of lighting unit, and the reflecting surface of lighting unit is formed by smooth finished surface.
Figure 15 shows the explanatory by the situation of lighting apparatus illumination adjacent position.
Figure 16 shows the explanatory that distributes according to the lighting unit of a plurality of arrangements of the 3rd embodiment and the illuminance by this lighting unit.
Figure 17 A illustrates the profile according to the annular lighting unit of the 5th embodiment, and Figure 17 B illustrates the upward view of annular lighting unit.
Figure 18 shows the profile of the configuration example of the reflector parts with different cross section structure.
Figure 19 A illustrates wherein the planes of arranging the lighting unit of light emitting diodes with two row, and Figure 19 B illustrates the profile of this luminescence unit, along its line B-B.
Figure 20 A illustrates the plane of the modification example that wherein is arranged in a row lighting unit shown in Figure 19, and Figure 20 B illustrates the profile of the modification example of C-C along the line.
Figure 21 A illustrates the plane of wherein arranging the lighting unit of light emitting diode with triplex row, and Figure 21 B illustrates the profile of the luminescence unit of D-D along the line.
Figure 22 illustrates the explanatory of the lighting unit with different a plurality of light emitting diodes of arranging.
Figure 23 shows the figure of the measurement result that the illuminance of comparative example 1-1 distributes.
Figure 24 shows the figure of the measurement result that the illuminance of comparative example 1-2 distributes.
Figure 25 shows the figure of the measurement result that the illuminance of routine 1-1 distributes.
Figure 26 shows the curve map of the illumination performance of routine 3-1.
Figure 27 shows the curve map of the light distribution performance of routine 3-1.
Figure 28 shows the curve map of the illuminance performance of routine 3-2.
Figure 29 shows the curve map of the light distribution performance of routine 3-2.
Figure 30 shows the curve map of the illuminance performance of routine 3-3.
Figure 31 shows the curve map of the light distribution performance of routine 3-3.
Figure 32 shows the curve map of the illumination performance of comparative example 3-1.
Figure 33 shows the curve map of the light distribution performance of comparative example 3-1.
Figure 34 A and 34B illustrate the lighting apparatus explanatory view according to correlation technique.
Reference number
11 driver elements
17 LED (light emitting diode)
21 luminous components
25 first reflection parts
25a paraboloidal mirror (parabolic surface)
25b paraboloidal mirror (smooth finished surface)
27 second reflection parts
The dull and stereotyped mirror (plate shape reflecting surface) of 27a
The dull and stereotyped mirror (smooth processing reflecting surface) of 27b
45 first boundary lines
47 second boundary lines
51 shades
100,300,400,500,600,700,700A, 700B, 700C lighting unit
200 lighting apparatus
The G step
HM second reflection part protrudes into the height in the emission side
The specific embodiment
Below, the preferred embodiment according to lighting unit of the present invention and lighting apparatus will be described with reference to the drawings.
(first embodiment)
Fig. 1 is the drawing of explanation according to the general structure of first embodiment of lighting apparatus of the present invention.
Lighting apparatus 200 according to the first embodiment of the present invention comprises lighting unit 100 and driver element 11.
Driver element 11 provides luminous driving power to lighting unit 100, and can use the gamut transformer as driver element.Driver element 11 is connected to source power supply, AC110 to 220V/50Hz is changed into driving voltage (the operable free voltage of DC 12V to the electrical power of 60Hz scope, as DC 6V or DC 24V or alternating current), then the driving voltage that changes is offered lighting unit 100.
Lighting unit 100 comprises backboard 15, has the luminescence unit 21 and the reflector parts 23 of a plurality of light emitting diodes (LED) 17, and a plurality of light emitting diodes (LED) 17 are in line and are arranged on the circuit board 19 as pedestal.Backboard 15 can be assembled to reflector parts 23 separatedly, has the circuit board 19 that inserts betwixt.
LED 17 has blue light diode and will change the fluorescent material of gold-tinted component from the blue light components of blue light diode into.In LED 17, when the blue light components from the blue light diode emission is absorbed by fluorescent material, fluorescent material emission gold-tinted component.When unabsorbed blue light components was mixed with the gold-tinted component, the white light component was launched as the output light component.
Fig. 2 A illustrates the side view of lighting unit, and Fig. 2 B is its bottom view, and Fig. 3 is its decomposition diagram.
Shown in Fig. 2 A and 2B, be mounted in the state of reflection part 23 at backboard 15, lighting unit 100 has height H.In this embodiment, height H is about 20mm, and this height H is more less than the situation of using heat emission bulb or fluorescent lamp as light source.When height H excessively hour, the deflection characteristic of reflector parts 23 is damaged.When height H was too big, the layout free degree of lighting unit 100 reduced, because need installing space.Therefore, height H preferably is set in 15 to 30mm the scope, or more preferably is arranged in 20 to 23mm the scope.
Reflector parts 23 integrally are provided with length-plate shape mounting base 24 (with reference to figure 3), first reflection part 25 is connected to mounting base 24, shown in Fig. 2 B, and have a plurality of (in this embodiment, 16) reflecting surface (paraboloidal mirror) 25a, each reflecting surface is made of parabolic surface, and has opening at the center, so that emission side is opened, and second reflection part 27, be set on the emission side of first reflection part 25, and have plate shape reflecting surface (dull and stereotyped mirror) 27a of the arranged direction that is parallel to paraboloidal mirror 25a.Because form dull and stereotyped mirror to 27a in perpendicular to the direction of the arranged direction of paraboloidal mirror 25a, in arranged direction, each side of second reflection part 27 is connected to parabola wall 27, wherein the paraboloidal mirror of first reflection part 25 is extended.At reflector parts 23 is by injecting molding molding resin molded integrally, and first and second reflection parts 25 and 27 reflecting surface are at least by electroplating or the aluminum evaporation method stands working procedure of coating.Be not limited to these, can use other common devices as reflecting surface.
Apply operation by evaporation, for example, the sputter electroplating work procedure is processed the reflecting surface (paraboloidal mirror 25a and dull and stereotyped mirror 27a) of first and second reflection parts 25 and 27.The sputter electroplating work procedure comprises coating, the aluminum evaporation in the vacuum of the underlying coating layer that uses special-purpose prime paint and enters the transparent coating of aluminum evaporation surface urethane.Even on the irregular surface that will be deposited, such as the parabolic surface of naval stores, can form uniform minute surface, and can form reflecting surface with high reflectance.
As shown in Figure 3, backboard 15 comprises the umbrella parts 29 with V-arrangement cross-sections surfaces, in the inner surface of umbrella parts 29, arrange rib 30, so that support the back of the body surface of circuit board 19, and umbrella parts 29 vertically in a plurality of positions (in this embodiment, five) locate to arrange latch hook 31, so that mesh with reflector parts 23.The hook-type that latch hook 31 usefulness have the U-shaped cross-sections surfaces forms.
Circuit board 19 is, for example, has the printed circuit board (PCB) of a plurality of (in an embodiment, the 16) LED 17 that installs in line, with along reflector parts 23 vertically corresponding to each paraboloidal mirror 25a.Lead-in wire 33 goes out (with reference to figure 1) from a layback that will be connected to driver element 11.Because circuit board 19 is one-sided installation modules, when taking place when unusual, it is pinpointed the problems easily, with and maintainability be excellent.
In reflector parts 23, growing-form the support 37 of priming illumination unit 100 in the both sides of plate shape mounting base 24, and meshing part 39 with latch hook 31 engagements of backboard 15 is being set in the upper and lower direction of the mounting base in Fig. 3 524.Meshing part 39 combines with the latch hook 31 of backboard 15 separably by snap action, has the circuit board 19 that inserts between meshing part 39 and backboard 15.
When reflector parts 23, circuit board 19 and backboard 15 interosculate, in the focal position of the paraboloidal mirror of first reflection part 25, place the light-emitting area of LED 17.In other words, in reflector parts 23, abutment surface is arranged separatedly on the surface of circuit board 19.Form this abutment surface, to have this height of the light-emitting area that LED 17 is set in the focal position of paraboloidal mirror.In addition, the rib 30 of backboard 15 is set as and has the height of pushing circuit board 19 when arranging circuit board 19 in the substrate memory location that forms in reflector parts 23 on this abutment surface.
Thus, when reflector parts 23, circuit board 19 and backboard 15 were interosculated simply, the mutual high accuracy in the position of the focal position of paraboloidal mirror and the light-emitting area of LED17 overlapped.Element above this structure allows is interosculated simply, and does not use the reinforcement means such as the screw that is used.Therefore, the number of parts reduce and be used to assemble or the operation number reduce so that boost productivity.
Next, the optical characteristics that description is had the lighting unit 100 of this structure.
Fig. 4 is the profile of lighting unit shown in Figure 2, A-A along the line.
The reflector parts 23 of lighting unit 100 have first and second reflection parts 25 and 27 that form continuously mutually.In the base ends of first reflection part 25, an opening 41 is set, wherein in the focal position of paraboloidal mirror 25a, arrange the light-emitting area of LED.The paraboloidal mirror 25a of first reflection part 25 has reflecting surface, this reflecting surface has parabolic surface, and wherein the focal position is set as the light-emitting area of LED 17, and will be from the direction reflection towards emission side of the light of LED 17, so that in wide in range perspective view, basically by collimation.
Second reflection part 27 that is provided with on the emission side of first reflection part 25 has the arranged direction with respect to paraboloidal mirror 25a, that is, the dull and stereotyped mirror 27a that is arranged in parallel with respect to the arranged direction of LED 17.Second reflection part 27 receives the light from LED 17 that is not irradiated onto on first reflection part 25, so that with the direction reflection of this light towards emission side, with basically by collimation.First reflection part 25 has predetermined reflecting surface district M1, and second reflection part 27 has continuous predetermined reflecting surface district M2 to reflecting surface district M1.Therefore, in wide in range perspective view, become the massive parallel light that to be irradiated onto on the target by the light of first and second reflection parts 25 and 27 reflections.
With respect to the optical axis of LED 17, the inclination angle of dull and stereotyped mirror 27a be set as be not irradiated onto first reflection part 25 from the luminous flux of LED 17 by the angle of collimation.Under the situation of this embodiment, with respect to the optical axis of LED, the inclination angle is arranged in 20 ° to 27 ° the scope.
Here, LED 17 has wide illumination angle, as 120 °.Although the number towards the optical component of side-emitted in the middle of light emitted increases, this light component is caught by first and second reflection parts 25 and 27, helps this light of collimation thus.Thus, the illuminance distribution can be by further even.
Next, the illuminance of describing by lighting unit 100 is distributed
Fig. 5 shows the curve map by the illuminance distribution of lighting unit.
As shown in Figure 5, by will be from the light quantity the scope W1 that the light component of LED 17 direct irradiations and the light components that arrive by first and second reflection parts 25 and 27 reflections form greater than other zones, with and clear border ground occur.This be because light be focused and in scope W1 luminous flux basically by collimation, so that scope W1 becomes the high state of emissive lighting degree.
Fig. 6 shows when LED is luminous, the explanatory of the state of the reflector parts of seeing from emission side.
As shown in Figure 6, the light-emitting area 17a of LED 17 is the center of LED element 17.Light-emitting area 17a with image projection on the whole surface of the paraboloidal mirror 25a of first reflection part 25.In addition, the image of light-emitting area 17a also is projected onto on the dull and stereotyped mirror 27a and 27a of second reflection part 27.That is because its diffusion, only first reflection part 25 makes and scatters from the light components of LED 17 direct irradiations, but the dull and stereotyped mirror 27a of second reflection part 27 makes that the light component that is scattered is scattered, being deflected, with by collimation.This effect increases the emissive lighting degree of the luminous flux that will obtain, and allows the accurately interior illuminance distribution of homogenising scope W1.As a result, the border of scope W1 is clearly seen.
Next, with the optical range of describing from lighting unit 100.
Fig. 7 is according to having or lack reflecting surface or its kind, check by the lighting unit light source among the embodiment emission brightness and apart from the notion curve map of the relation between the distance of light source.
When distance light source such as street lamp are provided with target with long distance, maybe when constitute emergency warning lamp or the like be used for notifying light source position apart from the time, the reached distance of light determines the performance of lighting apparatus.For example, Fig. 7 shows apart from the optical range of light source and depends on reflecting surface and situation about changing.
As shown in Figure 7, represent to launch the limit range of brightness by oblique line, wherein the position of light source can be identified.When reflector not being set, surpass distance L n, it is not enough that brightness becomes.When only paraboloidal mirror being set, at distance L n place, lighting unit has the emission brightness of permission, but surpasses distance L p brightness, becomes not enough.On the other hand, when paraboloidal mirror 25a and dull and stereotyped mirror 27a were set, until the distance L pp away from distance L n and Lp, this lighting apparatus also had enough brightness when the same with the present invention.This structure according to the present invention can be extended optical range significantly by the cooperative effect between paraboloidal mirror 25a and the dull and stereotyped mirror 27a.For example, when the total flux of light source is made as 42.81m,, obtain the brightness of 1200lx, obtain the brightness of 1000lx at the distance L p place of 30cm at the distance L n place of 15cm, and even in the brightness of the distance acquisition 2lx of 30m.
Fig. 8 shows the relative intensity of relative spectral power distribution and the correlation curve between the waveform.
In relative spectral power distribution, in 450 to 480nm waveform district, obtain to have high-intensity light, and obtain the light in the waveform district, the 560nm left and right sides.Vertex representation around the waveform of 440nm is from the light of blue light diode emission, and the broad peak around the waveform of 560nm is represented from the light of fluorescent material emission.In addition, because the light in the waveform district between the preferred 365nm to 410nm of insect is not included in this spatial distribution, this lighting apparatus 200 can realize wherein there is not the flight of harmful insect such as moth and mosquito.
Next, will the delivery altitude of second reflection part be described.
Fig. 9 shows the profile that second reflection part protrudes into the height in the emission side.Figure 10 shows the explanatory view by the surface of the illumination unit with second reflection part, and it highly is set as the H of Fig. 9 MFigure 11 A is the explanatory that schematically shows irradiates light of the present invention, and Figure 11 B and 11C are the explanatory that schematically shows the irradiates light of comparative example.
Thus, in lighting unit 100, second reflection part 27 protrudes into the height H in the light emission side MBe defined as predetermined altitude.That is, when luminous flux and the boundary line between its shade on the surface of second reflection part 27 (dull and stereotyped mirror 27a) from LED17 are set as first boundary line 45, should launch from first reflection part 25 from the luminous flux of LED 17, and when being set as second boundary line 47 from the boundary line between its shade on the surface (dull and stereotyped mirror 27a) of the luminous flux and second reflection part 27 of other LED 17 that is adjacent to LED 17, second reflection part 27 protrudes into the height H in the emission side MBe set as height H greater than the point 49 on second reflection part 27 of first boundary line 45 and second boundary line intersection 47 first time s, as shown in Figure 9.
In other words, second reflection part 27 protrudes into the height H in the emission side MBeing set as the shade 51 that produces in second reflection part 27 can be held, and does not arrive the height on the emission side that exceeds second reflection part 27, as shown in figure 10.When the luminous flux from LED 17 is not radiated on second reflection part 27, produce shade 51, launch from first reflection part 25 from the luminous flux of LED 17.
Shown in Figure 11 A, the height H of second reflection part 27 MBe defined as this value.When the luminous flux from LED 17 was not radiated at second reflection part 27, the shade 51 that produces on second reflection part 27 was arranged in the surface of second reflection part 27, does not propagate on the emission side that exceeds second reflection part 27.Therefore, make the influence of shade 51 of light uneven distribution be reduced, and obtain to have high-quality even illumination light.
On the other hand, when the height H of second reflection part MWhen departing from top restricted portion, shown in Figure 11 B, or second reflection part is not when existing, and shown in Figure 11 C, shade 51 is with luminous flux 53 outputs, so that produces the color shading or the netted shade 51a of illumination light.As a result, illumination light becomes inhomogeneous.
As mentioned above, lighting unit 100 and the lighting apparatus 200 that comprises this lighting unit according to this embodiment, first reflection part 25 will be from the direction reflection towards emission side of the luminous flux of LED 17, with by substantially parallel correction, and second reflection part 27 will not be incident on first reflection part 25 from the direction reflection of the luminous flux of LED 17 towards emission side, with by substantially parallel correction,, illuminance becomes even so that distributing.In addition, because the emissive lighting degree is high, the irradiation distance of light can extend.Because so that the LED 17 as light source to be provided at a low price, lighting apparatus itself can be with the low cost manufacturing.Because LED uses than incandescent lamp or fluorescent lamp power supply still less, can reduce running cost.Particularly, because improve illuminance and irradiation distance by first and second reflection parts 25 and 27, the power consumption of LED 17 almost is being 1/6 times of neon light and almost is being 1/8 times of fluorescent lamp under the equal illumination degree.This power consumption can improve the energy efficiency of illuminance, helps thus to reduce to discharge the influential CO of environment 2
Because under low pressure the trouble such as shock hazard takes place in driving LED 17 hardly after installing.In addition, ultraviolet light and infrared light do not damage irradiated object owing to not comprising basically.
Because lighting unit 100 is provided with reflector, this reflector is included in first and second reflection parts 25 and 27 on the emission side of LED 17, therefore compares with the situation that reflector is set in the back of the body surface of LED 17, can make the thickness of light source cell little.When storage light source cell in such as the position of the show cabinet that wherein limits installing space, these are favourable.
In addition, a plurality of LED 17 are arranged as a unit, to constitute luminescence unit 21.But if obtain the brightness of hope, luminescence unit 21 can only comprise a LED.The reflecting surface of the paraboloidal mirror 25a of first reflection part 25 can be can't help parabolic surface and be formed, but can be formed by hyperbola.In any case reflecting surface can be formed by the curved surface that is similar to parabolic surface, and in parabolic surface, can form exquisite dull and stereotyped mirror generally.
In the lighting unit 100 according to this embodiment, with respect to intersecting the arranged direction of LED 17 of LED 17, second reflection part that is arranged in parallel is to 27, as shown in Figure 4.Thus,, focus on and directly be incident on the light of second reflection part 27, two dull and stereotyped mirror 27a in 27 and 27 and 27a by second reflection part so that obtain high illuminance from LED 17.
In the lighting unit 100 that is provided with first reflection part 25 with paraboloidal mirror 25a and second reflection part 27 with dull and stereotyped mirror 27a, the height H on the surface of second reflection part 27 MBe set as the point 49 that is higher than on first and second boundary lines 45 and 47 second reflection parts that intersect for the first time.Therefore, when light is not radiated on second reflection part 27, the shade 51 that will produce in second reflection part 27 can be held, and do not arrive emission side on second reflection part 27, and can prevent when shade 51 is output with luminous flux 53, produce the color shading or the shade 51a of illumination light.As a result, can obtain to have high-quality even illumination light 55.
The lighting apparatus 200 that is provided with lighting unit 100 comprises the driver element 11 of the electrical power that is provided for driving LED 17.Therefore, when commercial electrical power is provided for driver element 11, under high illuminance, obtains even illuminance and distribute, save electrical power simultaneously.In addition, can shine illumination light by individual system independently without any color shading and shade.
The definition of the height of second reflection part 27 is applied to below the embodiment that will describe, can obtain even illumination light more reliably.
(second embodiment)
Next, with second embodiment that describes according to lighting unit of the present invention.
Figure 12 illustrates the perspective view of lighting unit, and its reflecting surface is formed by smooth finished surface.Figure 13 is the profile that illustrates reflector parts shown in Figure 12.Figure 14 shows the explanatory by the illumination profile of lighting unit, and its reflecting surface is formed by smooth finished surface.In the following embodiments, same reference numbers refers to and the element components identical shown in Fig. 1 to 6, with and describe and will be omitted.
In the lighting unit 300 according to this embodiment, first and second reflection parts 25 and at least one reflecting surface (paraboloidal mirror 25b and dull and stereotyped mirror 27b) of 27 are formed by smooth finished surface.
As the working procedure of coating that the above reflecting surface (paraboloidal mirror 25b and dull and stereotyped mirror 27b) of first and second reflection parts 25 and 27 stands, illustration the processing by the sputter electroplating work procedure.The sputter electroplating work procedure comprises coating, the aluminum evaporation in the vacuum of the underlying coating layer that uses special-purpose prime paint and the transparent coating of urethane that enters the aluminum evaporation surface.Therefore, when will be coated with the processing of coarse state surperficial the time, sputter electroplating work procedure light-emitting area afterwards can be formed by smooth finished surface.
In addition, the reflecting surface of smooth processing can be lacklustre or glossiness.Matt or glossy can the change by the priming coat liquid that preparation is electroplated.
Shown in Figure 13 and 14, the quantity by the scope W2 that forms from the light component of LED 17 direct irradiations and the light components that arrive by first and second reflection parts 25 and 27 reflections is greater than other zones, and the border of scope W2 is clearly.This be because light be focused, and in scope W2 luminous flux basically by collimation, so that scope w2 becomes the high state of emissive lighting degree.In addition, compared by the situation that minute surface forms with light-emitting area, although the highest luminance degree is slightly reduced, its illuminance becomes uniform scope W2 and is broadened, and can carry out wideer light emitting region by a lighting unit 300.In addition, change the angular aperture θ of dull and stereotyped mirror 27b, can adjust the deflection state of light with respect to the optical axis of LED 17.That is when angular aperture θ increased, illumination zone can be broadened.When angular aperture θ was reduced, light can be focused in the certain location.In the case, preferred first and second reflection parts are provided with being separated, and integrally do not constitute, and freely adjust the angular aperture θ of dull and stereotyped mirror 27b thus.
The above lighting unit 300 of the LED 17 of use polychrome mixed type as light source is set, first reflection part 25 has the reflecting surface (paraboloidal mirror 25b) that is formed by parabolic surface, its focal position is set as the light-emitting area of LED 17, and second reflection part 27 has and intersecting the plate shape reflecting surface that is arranged in parallel on the emission side of first reflection part 25 of LED 17 to (dull and stereotyped mirror 27b).First and second reflection parts 25 and 27 reflecting surface are formed by smooth finished surface.Therefore, in wide in range perspective view, it seems it is mirroring by the light of smooth processing reflecting surface reflection, but in the perspective view of microcosmic by diffuse reflection, shown in the arrow 43 of Figure 13.As a result, color is separated and the light of different frequency (waveform) component that disperses is mixed.That is blueness of separating and gold-tinted mix with white light.As a result, can high efficiency focus on the light of LED, and can obtain even illumination light, in irradiated region, not produce any color shading and shade, even when the light of LED closely shines.In addition, the quality of illumination light can be enhanced.
In addition, when throwing light on adjacent positions by the lighting apparatus 84 that is provided with White LED 82, as shown in figure 15, can stop the blue light components of White LED 82 and the color of fluorescent material exciting light component (gold-tinted component) to be separated reliably, so that on specific shot district S1 and S2, occur blue region and yellow region unevenly or produce shade.Therefore, when using lighting apparatus 100, obtain even illumination light, and do not reduce the quality of illumination light as the illumination light on the desk.
In addition, because the emission light of LED 17, must be provided with the needs of the little a plurality of LED elements 17 of the difference of its emission wavelength by the high efficiency scattering can be reduced.Under the situation of the lighting unit by minute surface reflection, use emission light from each LED 17 as illumination light same as before, and in the surround the clear difference of distinguishing emission wavelength.Therefore, in order to stop the wherein local different color shading of illumination light, need have the LED element of even emission wavelength.But reflecting surface is formed by aforesaid smooth finished surface, so that mirroring changes diffuse reflection into.Although the variation in emission wavelength of LED, light by diffusion to become illumination light.Therefore, the local color obfuscation is reduced, and the variation of emission wavelength is not clearly distinguished.Thus ,-processing smooth when forming is during reflecting surface, will not need strictly to be selected as the luminescent properties of the LED element of light source.In addition, can use cheap LED element, reduce the cost of lighting apparatus thus.In addition, although produce LED element, can effectively utilize the LED element, and not be wasted with big emission wavelength difference by LED element manufacturing process.Therefore, when using lighting unit of the present invention, LED element manufacturing process also has advantage.
(the 3rd embodiment)
Next, with the 3rd embodiment that describes according to lighting unit of the present invention.
In this embodiment, provide a kind of structure of carrying out the wide region illumination.
Figure 16 shows the explanatory that distributes according to the lighting unit of this embodiment and the illuminance by this lighting unit.
The lighting unit 400 of this embodiment comprises a plurality of lighting units 100 shown in first embodiment, and a plurality of lighting units 100 are arranged in parallel in the array.Arrangement interval between each lighting unit 100 is set to become smooth from the controlled whole illuminance distribution of the intensity of the illumination light component of adjacent lighting unit 100 (shown in a some chain line among the figure).
According to this structure, by arranging a plurality of lighting units, wherein illuminance becomes uniform scope and can be extended, and illuminated zone can be broadened, and does not reduce illuminance.And this lighting unit 100 can be identical with the lighting unit 300 of second embodiment, and lighting unit 100 and lighting unit 300 can interosculate.Thus, illumination light intensity and uniformity can suitably be adjusted.
(the 4th embodiment)
Next, with the 4th embodiment that describes according to lighting unit of the present invention.
In this embodiment, constitute lighting unit with toroidal.
Figure 17 A is the profile of the lighting unit of circle-annular, and Figure 17 B is its bottom view.
In the lighting unit 500 of this embodiment, along the circumferential directions on the circuit board 19 that forms in annulus or the plectane a plurality of (12 in this embodiment) LED 17.Corresponding to each LED 17, arrange first reflection part 25 respectively.In addition, on the emission side of first reflection part 25, form second reflection part 27 at inner and excircle, so that cover first reflection part 25 with annular.Each second reflection part 27 forms in circle continuous.
By lighting unit 500, form whole unit with annular with this structure.Therefore, the scope of illuminance wherein evenly appears in annular, although and the size of lighting unit 500 less, whole wide region can obtain even illuminance.Even in this case, reflecting surface can be improved scattering thus by smooth processing.In addition, when the lighting unit 500 with different-diameter is interosculated, can be with a plurality of lighting units of arranged in concentric circles, and can obtain even illuminance at whole wide region, although this unit is small-sized.
(the 5th embodiment)
Next, with the 5th embodiment that describes according to lighting unit of the present invention.
Figure 18 illustrates the profile of the configuration example of the reflector parts with other cross section structure.
In the lighting unit 600 of this structure, at the light path arranged in front convex mirror 47 of the LED 17 that is used as light source, as shown in figure 18.Therefore, the most of light from LED 17 emissions are irradiated onto on the convex mirror 47.With on the convex mirror 47 that is reflected the irradiation light by the plate mirror 27a collimation of the paraboloidal mirror 25a of first reflection part 25 or second reflection part 27.In addition, be not irradiated onto some light of convex mirror 47 by the plate mirror 27a collimation of second reflection part 27.Thus, must be by first and second reflection parts 25 and 27 deflections light from LED 17 emissions, with by collimation.Then, this light becomes the front end that points to light path in the high state of emissive lighting degree.
As top example, the structure of reflector parts can suitably be revised.In addition, can carry out following improvement.
For example, the dull and stereotyped mirror 27a of second reflection part 27 can be formed by curved mirror, so that in preset distance focused light (to form image).In addition,, change the angular aperture θ (with reference to Figure 14) of dull and stereotyped mirror 27a, can adjust the deflection state of light with respect to the optical axis of LED 17.In other words, because angular aperture θ increases, illumination zone can be broadened.Because angular aperture θ is reduced, light can be focused in the certain location.In the case, preferred first and second reflection parts are provided with being separated, and integrally do not constitute, and freely adjust the opening angle θ of dull and stereotyped mirror 27b thus.
(the 6th preferred embodiment)
Next, with the 6th embodiment that describes according to lighting unit of the present invention.
Figure 19 A is a plane of wherein arranging the lighting unit of light emitting diode with two row.Figure 19 B is its profile, along the line B-B of Figure 19 A.
In lighting unit 700, arrange a plurality of LED 17 with multirow (in drawing, two row), shown in Figure 19 a according to this embodiment.Corresponding to each LED 17, first reflection part 25 is set, and to arrange each row in the zigzag figure, wherein the arrangement pitch of each row is changed 1/2 arrangement pitch into first reflection part 25 in the line direction.Subsequently, arrange two adjacent lines L1 and the L2 and first reflection part 25 of LED 17, so that first reflection part, 25 the most contiguous or mutual vicinities, shown in Figure 19 B.In addition, the LED 17 and first reflection part 25 are arranged with respect to emission side and have step G.
In the outside in the arranged direction of a plurality of light emitting diode lines, in the light-emitting diodes route of pipe line, be arranged in parallel second reflection part to 27 with respect to the arranged direction of light emitting diode.
In the lighting unit 700 that constitutes in this way, because each row is contiguous mutually, shade 51 is reduced.In addition, the step G by an adjacent LED 17 (with the step in the reduction direction of light emission direction opposite side) also reduces shade 51.That is, towards the parallel moving boundary line of direction (downside of Fig. 9) of LED 17 (for example, first boundary line 45), this first boundary line 45 is sides of intersection drift angle shown in Figure 9 (point 49), reduces to be clipped in the leg-of-mutton basically shade 51 between first and second boundary lines 45 and 47 that form on the surface of second reflection part 27 thus.Therefore, shade 51 is further reduced, and produces so that suppress the color shading or the shade of illumination light.
Shown in Figure 20 A and 20B, lighting unit 700 can be made of the lighting unit 700A that wherein connects two lighting units 700.
Figure 20 A is the plane of modification example of the lighting unit shown in Figure 19 A and the 19B of wherein being arranged in parallel.Figure 20 B is its profile, along the C-C line.In the case, second reflection part 27 that has been placed in the coupling part is removed, and therefore only stays second reflection part to 27, so that clamp whole unit on the outside.
Lighting unit 700 according to this embodiment can be by wherein arranging that with triplex row the lighting unit 700B of LED17 forms, as shown in figure 21.
Figure 21 a is a plane of wherein arranging the lighting unit of light emitting diode with triplex row, and Figure 21 B is its profile, D-D along the line.In the case, the line L2 that is disposed in the center is arranged to and is lower than step G, and the line L1 of both sides and L3 are arranged and are higher than line L2.This structure is passed through same function as above, also can reduce shade 51, produces so that can suppress the color shading and the shade 51a of illumination light.And, can form the step G of LED 17, so that adjacent light-emitting diodes pipeline has different steps.Therefore, can with the convex-concave shape form each the row between concaveconvex shape so that recessed portion is squeezed in the convex portions.In addition, this light-emitting diodes route of pipe line can be set as has the length identical with the arranged direction of the light-emitting diodes route of pipe line, so that form second reflection part 27 with the substantial rectangular frame shape.
According to the structure of this embodiment, wherein in third and fourth embodiment, can form the LED that arranges with a plurality of row with array or annular respectively.In the case, can obtain a large amount of illumination light.Figure 22 shows another layout of a plurality of light emitting diodes.In the case, lighting unit 700C has in annular second reflection part 27 a plurality of first reflection parts 25 with the zigzag graphical layout.Even in this case, LED 17 has step between the adjacent LED with respect to light emission direction.In Figure 22, form second reflection part 27 with the hexagon frame shape.But, being not limited thereto, it can form with arbitrary polygon shape or toroidal.
Up to now, in detail or with reference to certain embodiments the present invention has been described.But those of ordinary skill in the field obviously know, under the condition that does not break away from the spirit and scope of the present invention, can carry out various changes and improvements.
The application is based on the Japanese patent application No. 2005-249986 of the Japanese patent application No. 2004-346543 of 30 applications November in 2004, application on August 30th, 2005 and the Japanese patent application No. 2005-257976 of application on September 6th, 2005.Its content is included as reference.
Example 1
Below, will describe calculate the result who wherein uses according to the optical property of the lighting apparatus of lighting unit of the present invention.
Performance according to the lighting apparatus 200 of the first embodiment of the present invention is shown as follows:
The number of LED: 16
The overall dimension of reflector parts
Length: 23.8mm, width: 264mm; (H): 16.25mm. highly
According to lighting apparatus 200, tentatively obtain following fundamental characteristics with this structure:
Straight irradiation distance (obtaining up to the ultimate range of illuminance): surpass 30m greater than the position of 1lx from light source position
Illuminance under the spotlight (under spotlight, the illuminance in the position of 2m distance): 48.5lx/m 2
Electrical property,
When under 12V, driving (common in AC/DC): each 0.09A 1.1Wh
When under 24V, driving (common in AC/DC): each 0.08A 1.92Wh
Optical characteristics
Total flux (when when 12V drives): 18.81m
Total flux (when when 24V drives): 42.81m.
Here, in order to check the effect of lighting unit 100, in following condition, carry out the test that illuminance distributes with this structure.
Top lighting unit is set as example 1-1, the lighting unit that only comprises the luminescence unit 21 with reflector parts of removing from above lighting unit is set as comparative example 1-1, and only comprises that the lighting unit as first reflection part 25 of the reflector parts of above lighting unit is set as comparative example 1-2.That is, three models are provided, as have the illumination section (example 1-1) of the combination of paraboloidal mirror and dull and stereotyped mirror, the lighting unit (comparative example 1-2) that only has the lighting unit (comparative example 1-1) of paraboloidal mirror and do not have reflector.
When measuring illuminance, in the darkroom, prepare the chest of 30cm * 35cm * height 49cm, and in this chest the lighting unit of three models above the layout.Measure the illuminance in each scheduled measurement position by illuminance measuring system (making model 510 02 by Yokogawa Instruments Corporation).
Figure 23 shows the drawing of the measurement result that the illuminance of comparative example 1-1 distributes.Figure 24 shows the measurement result of the illuminance distribution of comparative example 1-2.Figure 25 shows the measurement result of the illuminance distribution of comparative example 1-1.
In comparative example 1-1, wherein whole wide-angle scope forms the zone that illuminance is about 100lx, even maximum illuminance only is 115lx, as shown in figure 23.
In comparative example 1-2, form clear zone, and range of exposures is identical with width in the open side of paraboloidal mirror basically, as shown in figure 24 with 360 to 400lx illuminances.
On the contrary, in example 1-1, in identical with the width of dull and stereotyped mirror basically scope, form the intensive clear zone that has above the substantial constant illuminance of 900lx, as shown in figure 25.In this outside, clear zone, illuminance is considerably reduced to about 200lx.The intensive clear zone of example 1-1 obviously is different from the clear zone of its obscure boundary Chu in comparative example 1-2, means that the position in this clear zone can clearly be discerned.
Next, the effect that compares the reduction power consumption in this lighting apparatus.Here, substituted by lighting apparatus of the present invention,, compare the power consumption difference between the both sides so that illuminance has in the situation of same levels at the conventional lighting apparatus that uses fluorescent lamp or bulb type fluorescence lamp.
[table 1]
Figure C200580016064D00301
The power consumption of comparative example 2-1 is 448W, wherein uses the freezing line fluorescent lamp of anti-phase type (56W x 8).In order to obtain the illuminance identical with comparative example 2-1, at routine 2-1 preparation 70 lighting units altogether, have with wherein in conjunction with the lighting unit (led array) of DC 24V driving and the identical structure of first embodiment of reflecting plate.Because under the driving voltage of DC 24V, the power consumption of each lighting unit is 1.92W, the power consumption of 70 lighting units becomes 134W.That is when the last lighting apparatus of the power consumption of 448W changed lighting apparatus of the present invention into, power consumption was lowered 134w, is 0.3 times.
The power consumption of comparative example 2-2 is used by Hitachi, and the lighting apparatus EG-9818 that is made by Endo Lighting Corporation of the fluorescent lamp EFD9EL-E17 (9W x 60) that Ltd. makes is 540W.In routine 2-2,, 132 lighting units altogether of first embodiment have been prepared in order to obtain the illuminance of same levels.Because under the driving voltage of DC 24V, the power consumption of each illumination is 1.92W, the power consumption of 132 lighting units becomes 253W.That is power consumption in the case is lowered 0.47 times.
The power consumption of comparative example 3-3 is used by Hitachi, and the lighting apparatus EG-9818 by Endo Lighting Corporation manufacturing of the fluorescent lamp EFD9EL-E17 (9W x 36) that Ltd. makes is 324W.In example 2-3,86 lighting units altogether of first embodiment have been prepared, so that obtain the illuminance of same levels.Because under the driving voltage of DC12V, the power consumption of each illumination is 1.1W, the power consumption of 86 lighting units is 4.6W.That is power consumption in the case is lowered 0.29 times.
Next, in following condition, carry out the test of illuminance performance and light distribution performance for the effect of checking lighting unit 100 with this structure and 300.
In the structure of above embodiment, its reflecting surface is set as routine 3-1 by the lighting unit 100 that minute surface forms, in the structure of above embodiment, its reflecting surface is set as routine 3-2 by smooth-lighting unit 300 of forming of the glossiness surface of processing, with and the lighting unit 300 of the reflecting surface that forms by smooth-mat surface of processing of reflecting surface be set as routine 3-3.Only there is the lighting unit of the LED 17 that first and second reflection parts 25 and 27 wherein are not set to be set as comparative example 3-1.
The performance of the lighting unit that uses in example and the comparative example is as follows:
The number of LED: 16
The overall dimension length of reflector parts 23:
Length: 23.8mm, width: 264mm; (H): 16.25mm highly
By in electroplating work procedure, using different priming coat liquid to form the smooth-glossy reflecting surface of processing of routine 3-2 and the matt reflecting surface of the smooth processing of routine 3-3.That is, as the priming coat liquid of routine 3-2, use " the K173NP priming coat " made by Toyo Kogyo Toryo Co.Ltd..The priming coat liquid of 3-3 uses " 500mat28 " that made by Hisho K.K. as an example.
By using a large amount of sand paper, the glossy or lacklustre surface nature on the reflecting surface can be defined as roughness.That is, corresponding to the sand paper number N of the surface nature of routine 3-2 1Be #70≤N 1≤ #100, preferred, #_80≤N 1≤ #90.In addition, corresponding to the surface nature sand paper number N of routine 3-3 2 Be #60≤N 2≤ #100, preferred, #75≤N 2≤ #85.
Figure 26 shows the curve map of the illumination performance of routine 3-1.Figure 27 shows the curve map of the light distribution performance of routine 3-1.Figure 28 shows the curve map of the illuminance performance of routine 3-2.Figure 29 shows the curve map of the light distribution performance of routine 3-2.Figure 30 shows the curve map of the illuminance performance of example 3-3.Figure 31 shows the curve map of the light distribution performance of routine 3-3.Figure 32 shows the curve map of the illumination performance of comparative example 3-1.Figure 33 shows the curve map of the light distribution performance of comparative example 3-1.At Figure 27, in each curve map of 29,31 and 33, the angle of trunnion axis represent when measuring instrument with as the central shaft of the light-emitting area of the lighting unit 100 of the rotating shaft angle during half-twist symmetrically.In addition, the solid line in each curve map represent to be parallel to lighting unit 300 axle is set as rotating shaft longitudinally the time measurement result, and dotted line represent when perpendicular to rotating shaft spool be set as rotating shaft the time measurement result.
Routine 3-1 has been shown, the surface property of 3-2 and 3-3 and comparative example 3-1, power supply, total flux, efficient, maximum light intensity, 1/2 beam angle and evaluation in table 2.
[table 2]
Surface property Input voltage [v] Input current [mA] Input power [w] Total flux [lm] Efficient [lm/w] Maximum emission intensity [cd] 1/2 beam angle [deg] Estimate
Example 3-1 Minute surface 12.01 89.09 1.07 42.7 34.1 96.5 11.5 O (color shading, shade)
Example 3-2 The smooth gloss that is processed with 12.01 88.78 1.07 36.4 34.1 96.5 25 O
Example 3-3 Smooth processing is matt 12.01 88.57 1.06 38.7 36.4 53.0 44 O
Comparative example 3-1 Module only 11.99 88.19 1.06 43.3 41.0 14.7 11.5 X (not enough illuminance)
In routine 3-1, in the irradiation distance of 2m, the horizontal range by about 0.4mm forms the irradiated region of illuminance 50lx, as shown in figure 26.In addition, as shown in figure 27, in the luminous intensity of-10 ° to 10 ° light distribution angle places acquisitions 50 to about 400cd.In the close position of irradiation distance, the color separated (color shading) or the shade that are divided into gold-tinted component and blue light components are identified.But when irradiation distance increased, color shading and shade disappeared.
In routine 3-2, in the irradiation distance of 2m, the horizontal range by about 0.8mm forms the irradiated region of illuminance 10lx, as shown in figure 28.In addition, as shown in figure 29,, obtain 20 to about 50cd even luminous intensity at-30 ° to 30 ° light distribution angle place.The light color separation that becomes gold-tinted and blue light is not identified.
In routine 3-3, in the irradiation distance of 2m, the horizontal range by about 0.8mm forms the irradiated region of illuminance 10lx, as shown in figure 30.In this zone, form the irradiated region of illuminance 20lx by the horizontal range of about 0.4mm.In addition, as shown in figure 31,, obtain 20 to about 100cd luminous intensity at-30 ° to 30 ° light distribution angle place.The light color separation that becomes gold-tinted and blue light is not identified.
In comparative example 3-1, shown in figure 32, in the irradiation distance of 1.6m, the horizontal range by about 0.8mm forms the irradiated region of illuminance 5lx, means not guarantee enough illuminances.But, as shown in figure 33, forming a zone, the light distribution angle place at-90 ° to 90 ° changes 0 to about 15cd luminous intensity reposefully.The color separation that becomes gold-tinted and blue light is not identified.
In routine 3-2, wherein reflecting surface is formed by the glossy surface of smooth-processing, and in routine 3-3, wherein reflecting surface is formed by the mat surface of smooth-processing, and the light of LED can be focused on by high efficiency, and does not produce color shading or shade.In addition, in each embodiment, wherein the height of second reflecting surface belongs to limited range, and with the comparative example 1-1 that is not provided with second reflecting surface, 1-2 and 3-1 compare, and can obtain even illuminance reliably and distribute.
Industrial applicibility
According to the present invention, under height illumination degree, obtain the irradiation district that constant smooth illumination degree distributes, save simultaneously electrical power. In addition, the present invention can suitably be applied to extend the illumination of the irradiation distance of light.

Claims (11)

1. lighting unit that has as the light emitting diode of light source, this lighting unit comprises:
The luminescence unit of a plurality of light emitting diodes that have pedestal and on this pedestal, arrange;
Corresponding to a plurality of first reflection parts that each a plurality of light emitting diodes on the emission side of luminescence unit are provided with, each first reflection part has parabolic surface, and its focal position is the light-emitting area of this light emitting diode; And
Be parallel to a pair of second reflection part that the arranged direction of the light emitting diode on the light emission side of first reflection part that passes light emitting diode is arranged, each second reflection part has the reflecting surface of plate shape, the light of the diode of self-luminous in the future is towards the direction reflection of emission side
The reflecting surface of wherein said plate shape is shared by the light emitting diode institute more than.
2. according to the lighting unit of claim 1, wherein, when from the emission of first reflection part be set as first boundary line from the luminous flux of light emitting diode and the boundary line between its shade on second reflection part time,
Wherein, when being set as second boundary line from the luminous flux of another light emitting diode that is adjacent to this light emitting diode and the boundary line between its shade on second reflection part, second reflection part protrudes into height in the emission side and is set as the point that is higher than on second reflection part that first and second boundary lines wherein intersect for the first time.
3. lighting unit that has as the light emitting diode of light source, this lighting unit comprises:
The luminescence unit of a plurality of light emitting diodes that have pedestal and on this pedestal, arrange;
Corresponding to first reflection part that each a plurality of light emitting diodes on the light emission side of luminescence unit are provided with, each first reflection part has parabolic surface, and its focal position is the light-emitting area of light emitting diode; And
On the emission side of first reflection part, have second reflection part of plate shape reflecting surface, the light of this plate shape reflecting surface self-luminous in the future diode reflects towards the direction of emission side,
Wherein, be set as first boundary line when what launch from the luminous flux of light emitting diode and the boundary line between its shade on second reflection part from first reflection part, when being set as second boundary line from the luminous flux of another light emitting diode that is adjacent to this light emitting diode and the boundary line between its shade on second reflection part, second reflection part protrudes into height in the emission side and is set as the point that is higher than on second reflection part that first and second boundary lines wherein intersect for the first time.
4. according to the lighting unit of claim 3, wherein, arrange a plurality of light emitting diodes with multirow, and in two outsides of the arranged direction of a plurality of light emitting diode lines, the arranged direction that is parallel to the light emitting diode in the light emitting diode lines arranges that second reflection part is right.
5. according to the lighting unit of claim 4, wherein, between light emitting diode lines and another light emitting diode lines of being adjacent, in light emission direction, the light emitting diode between each row has step.
6. according to the lighting unit of claim 4, wherein, with zigzag graphical layout light emitting diode lines, wherein the arrangement pitch of each row is changed 1/2 arrangement pitches into first reflection part in the line direction.
7. according to the lighting unit of claim 6, wherein, between light emitting diode lines and another light emitting diode lines of being adjacent, in light emission direction, the light emitting diode between each row has step.
8. according to the lighting unit of claim 1, wherein, the reflecting surface of first and second reflection parts is formed by the minute surface by evaporation coating.
9. according to the lighting unit of claim 1, wherein, at least one reflecting surface of first and second reflection parts is by smooth processing.
10. according to the lighting unit of claim 1, wherein, light emitting diode is to have blue light-emitting diode and will change the white light emitting diode of the fluorescent material of gold-tinted component from the blue light components of blue light-emitting diode into.
11. a lighting apparatus comprises:
Lighting unit according to claim 1; And
Be provided for driving the driver element of the electrical power of lumination of light emitting diode.
CNB200580016064XA 2004-11-30 2005-09-13 Illumination unit and illumination apparatus Expired - Fee Related CN100510518C (en)

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JP2004346543A JP3694310B1 (en) 2004-11-30 2004-11-30 LIGHTING UNIT AND LIGHTING DEVICE HAVING THE SAME
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JP249986/2005 2005-08-30
JP257976/2005 2005-09-06

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