CN101260978A

CN101260978A - Illumination method using LED as illuminating source and illuminating apparatus

Info

Publication number: CN101260978A
Application number: CNA2007100797358A
Authority: CN
Inventors: 欧阳杰; 欧阳伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-06
Filing date: 2007-03-06
Publication date: 2008-09-10

Abstract

The invention discloses an illumination method taking LEDs as a light source, wherein, the LEDs are intensively arranged on an LED fixing plate to form an array; each LED and the LED fixing plate form a certain setting angle so that the light emitted by the LED is shed to an illuminating unit corresponding to the LED; a convex lens is arranged in front of the LED; and the LED is positioned between single focus and twice focus of the convex lens; and the distance between the LED and the convex lens can be adjusted. After the proposal is adopted, because each LED is arranged according to different angles and forms correspondence to the illuminating unit on the illuminating side, the light emitted by each LED forms a condensed light spot instead of complete diverging light on the illuminating side, thereby the illuminating distance is long; the arranging intervals of the LEDs and the position of the convex lens are adjusted so that images of all LEDs on the illuminating side are closely arranged and distributed in the whole area; residual light on the edges of the LEDs is omitted so that the edge brightness of the illuminating side of an LED illumination device is high; therefore, the illumination of the whole LED illumination device is even and the range of the illuminating side is increased.

Description

A kind of means of illumination and lighting device of making light source with LED

Technical field

The present invention relates to a kind of means of illumination and a kind of lighting device, refer to means of illumination and the device as light source especially with LED.

Background technology

Conventional road lamp such as high-pressure mercury-vapor lamp are luminous to be the illuminating product that relies on heating power, needs to rely on the reflection unit that adds, as reflector, lampshade etc.., the waste of this light source can be up to 40-60%.And the performance of led light source, but can be with the luminosity direct irradiation of 80-90% on object, so under identical lumen numerical value, led light source and other conventional light source relatively have good superiority.The LED illumination has become the green illumination and the energy-conservation mainstream of the times, and related application is at state-of-the-art technology and products such as street lamp, decorative lighting, night scene engineerings.In view of this, the dealer develops the LED street lamp one after another.Owing to be subjected to the restriction (being generally the 30-40 lumen) of the luminous power of LED, existing dealer's LED lighting device generally uses the tabular installing plate, and the luminous light path of LED is a sharp cone distal, thereby the light that different LED is sent is superimposed to improve brightness, and shadow surface on the ground is rounded simultaneously.But a very serious problem can occur be, because the illumination angle of LED is less, this type of LED lighting device shadow surface radius is less, the shadow surface radius has only 12m when highly for 5.5m, center brightness is more than 40LUX and the brightness at edge only has 3LUX, exist irradiation center brightness the brightest, the situation that the edge is darker.If street lamp height higher (is 12m as highway), at interval when big (two street lamps of highway are spaced apart 30m), the part in the middle of two street lamps does not then have light fully, does not meet national standard.And LED is installed on the fixed head on plane, limited by the LED irradiating angle, and the irradiating angle of street lamp is little, and its range of exposures is less, must solve brightness and range of exposures by using a plurality of LED of high power or reducing the street lamp spacing, has increased cost.A kind of street lamp is invented by U.S. CREE company, and this street lamp is distributed on two " V " font plates by six groups or eight groups of LED, and wherein, middle two groups be directly to be provided with, and is respectively equipped with the lens cap of different angles on all the other several groups of LED, thereby makes the range of exposures increase.But the shortcoming of this street lamp is each group LED also to be provided in a side of on the same flat board, and its luminous major part still can cross, and as not wanting it is crossed, and then need increase the distance between LED; The LED rear portion is provided with bigger heat dissipating housing simultaneously, thereby makes this lighting device volume bigger; Simultaneously, owing to will add the lens cap of different angles on LED, make the illuminator structure relative complex that becomes, cost increases; And owing to be added in lens cap on the LED for fixedly installing, it can't adapt to the requirement to street lamp height, brightness variation.

Summary of the invention

It is the means of illumination and the device of light source with LED than big and brightness of illumination uniformly that content of the present invention provides a kind of range of exposures.

For reaching above-mentioned purpose, the present invention is a kind of to be the means of illumination of light source with LED, wherein, comprises following step:

1), a plurality of LED is installed on the LED fixed head, and each LED the place ahead is provided with the lenticular device adjustable with the LED spacing respectively;

2), zone to be illuminated is divided into a plurality of lighting units by the LED number, the corresponding lighting unit of each LED;

3), the distance of regulating each convex lens and LED, make the LED shadow surface cover its corresponding illumination unit just.

The light that sends as LED crosses earlier and afterwards disperses when forming hourglass shape, the pass of its irradiation distance and angle is: illumination length L=(y+y1)/sin α, wherein y is the distance at lighting unit center of the lighting unit Center-to-Center LED correspondence of a certain LED correspondence, and y1 is the spacing of this LED and center LED.

When every group of LED light path is fan-shaped, the pass of its irradiation distance and angle is: illumination length X=(N-M)/sin α, wherein N is the distance at lighting unit center of the lighting unit Center-to-Center LED correspondence of a certain LED correspondence, and M is the spacing of this LED and center LED.

A kind of is the lighting device of light source with LED, comprise LED and LED fixed head, form array on the intensive LED of the being installed in fixed head of LED, wherein, described each LED forms certain setting angle with the LED fixed head so that the illumination that LED sends is mapped in its corresponding corresponding lighting unit, be provided with convex lens in LED the place ahead, LED at one times of focal length of convex lens between the two focus length and between the two apart from adjustable.

Described LED and convex lens are divided into two distances and can regulate mutually in the body, and this two body is folded in the installing hole of fixed head.

Described LED fixed head is an arc surface.

Described LED fixed head is dull and stereotyped, and described LED fixed head is provided with the installing hole of different angles.

Described LED fixed head is dull and stereotyped, and described installing hole is arranged on the LED fixed head, is not provided with the coupling that is provided with different angles between the body of LED and installing hole on the same group.

Described fixed head is spliced by plurality of modules, and described module is provided with the projection and the draw-in groove that can connect with other module falcons.

A kind of is the lighting device of light source with LED, comprise LED and LED fixed head, form array on the intensive LED of the being installed in fixed head of LED, it is characterized in that: described each LED forms certain setting angle with the LED fixed head so that the illumination that LED sends is mapped in its corresponding lighting unit, and each LED goes up and is provided with different scattering angle lens by setting angle.

After adopting such scheme, because each LED is all by the different angles setting and form corresponding with the lighting unit of shadow surface, because LED once focuses on during fabrication, the one times of focal length that is positioned at convex lens at LED is to the two focus length place, what the light that each LED sends formed on shadow surface is hot spot that converges rather than the light of dispersing fully, so irradiation distance is far away; By the installing space of adjusting LED and the position of convex lens, make all LED in the imaging on the shadow surface near being covered with whole subregion after arranging, omit the surplus light in LED edge, and the imaging of each LED is only uniform, in addition because to impinge upon on the shadow surface be the hot spot that converges of LED, its illuminance distribution, thereby make LED lighting device shadow surface edge brightness also higher, therefore the illumination of whole LED lighting device is more even, and the scope of shadow surface increases.

Description of drawings

Fig. 1 is that body of the present invention is regulated schematic diagram;

Fig. 2 is a LED distribution schematic diagram of the present invention;

Fig. 3 is a light path schematic diagram of the present invention;

Fig. 4 is a structural representation of the present invention;

Fig. 5 is that illumination angle of the present invention and irradiation distance concern schematic diagram;

Fig. 6 is another embodiment of the present invention structural representation;

Fig. 7 is another embodiment of the present invention light path schematic diagram;

Fig. 8 is further embodiment of this invention structural representation;

Fig. 9 is further embodiment of this invention light path schematic diagram;

Figure 10 is that further embodiment of this invention illumination angle and irradiation distance concern schematic diagram;

Figure 11 is a mounting plates structure schematic diagram of the present invention;

Figure 12 is an installing plate assembling schematic diagram of the present invention.

The specific embodiment

Thinking of the present invention is will desire the zone illuminate earlier to be divided into lighting unit by the number of LED, has added convex lens before the LED, regulates the focal position of LED, and the hot spot of its formation is dropped in its corresponding subregion.

The invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, LED and convex lens are positioned in respectively in body 1 and the body 2, and body 1 connects together and can slide relatively with body 2 and realizes regulating the spacing of LED and convex lens.When body 1 elongated with body 2 distances, the hot spot that LED forms on shadow surface diminished; When body 1 reduced with body 2 distances, it is big that the hot spot that LED forms on shadow surface becomes.

As shown in Figure 2, described LED presents the rectangle array and arranges, and shadow surface is and the road parallel rectangular, according to the quantity of LED shadow surface is divided into some lighting units.LED is located at one times of focal length of convex lens between two focus length, LED is shone on shadow surface form a hot spot and cover its corresponding lighting unit.Since this hot spot be LED converge light rather than diverging light, brightness is more even.Make a plurality of LED on road, form arranging of hot spot by adjusting, this hot spot can be link to each other at the edge or the edge form overlapping because LED is array and arranges, so form the even and complete shadow surface of a brightness.With the highway illumination is example, two street lamps are spaced apart 30m on highway, the street lamp height is 12m, the rectangular region of the wide about 6m of each 15m about requiring street lamp to illuminate is divided the four lines arrangement with the LED of 100 1 watt of 80 lumens, and its long face direction is consistent with road depth direction, by desiring to regulate earlier the distance of LED and convex lens, make LED form the hot spot that is not less than 1.2m on the road surface, all hot spots are arranged in a time-out, and the road of distance that can 30m is long illuminates (as shown in Figure 3) fully; And the hot spot brightness of distal-most end is not less than 10LUX, and the brightness of center spot is not less than 20LUX, meets the standard-required that edge and center brightness ratio is not less than 1: 2 or 1: 3.

As shown in Figure 4, the body 1 that is used to be provided with LED is located at installing plate 3, on installing plate 3, be provided with the installing hole of 4 groups of 25 different angles, body 1 is arranged in the installing hole, in the one group body, middle body 1a is vertical setting with installing plate 3, formation one angle between all the other bodys 1 and body 1a but not be arranged in parallel, and this angle is increase step by step from inside to outside.Equally, also be dispersion setting between these 4 groups of LED.When the lighting device height is 12m, the ground illumination length is 30m, and every group of luminous total angle of LED is 98.7 °, is every group of LED angle and irradiation distance data (owing to being to be symmetrical arranged, only getting half) below:

Sequence number angle length

1 (center) 0 12000

2 5.57 12049

3 11.03 12218

4 16.30 12494

5 21.29 12870

6 25.96 13338

7 30.28 13887

8 34.25 14509

9 37.88 15194

10 41.18 15934

11 44.17 16721

12 46.89 17549

13 49.35 18416

As shown in Figure 5, the pass of its irradiation distance and angle is: illumination length X=(N-M)/sin α, and wherein N is the distance at the lighting unit central point of a certain LED correspondence lighting unit center corresponding with center LED, M is the spacing of this LED and center LED.

As shown in Figure 6, installing hole 31 ' is arranged on the installing plate 3 ', and coupling 4 ' is installed on the installing hole 31 ', and each coupling 4 ' forms different setting angles, body 1 is installed on the installing plate 3 ' with different angles by different couplings 4 ', and the light path that every group of LED sent is fan-shaped.Aforesaid coupling 4 ' can be a fixed angle, and its angle also can be regulated.

Installing plate of the present invention can be dull and stereotyped, also can be cambered plate, and when body 1 was vertically mounted on the convex surface of cambered plate, the light path of LED was fan-shaped.

As shown in Figure 7, this body 1 is assembles the shape setting, and the light path of LED is the hourglass shape, promptly converges earlier behind the planoconvex lens afterwards to disperse out and form hot spot on the ground.

Shown in Fig. 8,9, installing plate is a cambered plate, when body 1 is installed in the cambered plate concave surface, converges afterwards earlier behind the light planoconvex lens that LED sends and disperses out (hourglass shape) and form hot spot on the ground.

When the lighting device height is 12m, when the ground illumination length is 30m, be example with every group of 25 LED, to arrange by the outside sequence number in center, the angle of each LED lamp and irradiation distance data are as follows:

Sequence number angle length

1 0 12183

2 5.77 12244

3 11.44 12425

4 16.89 12720

5 22.05 13122

6 26.87 13621

7 31.32 14207

8 35.40 14809

9 39.12 15597

10 42.50 16380

11 45.55 17215

12 48.32 18090

13 50.83 19000

As shown in figure 10, the pass of its irradiation distance and angle is: illumination length L=(y+y1)/sin α, and wherein y is the distance at lighting unit center of the lighting unit Center-to-Center LED correspondence of a certain LED correspondence, y1 is the spacing of this LED and center LED.

Because LED forms the hot spot that converges on shadow surface, its brightness is even, can be added in LED by drive circuit control and go up voltage and current and the bright lamp number of control LED, reaches purpose of energy saving.In addition, directly adopt dc pulse voltage, make the LED lighting device more energy-conservation, as to be added in DC voltage on the LED be human eye when to discover work period less than stroboscopic be impulse wave more than the 50Hz that its electric energy loss will greatly reduce; Simultaneously, adopt above-mentioned two kinds of schemes after, LED lighting device liberated heat will greatly reduce, and only need get final product with 1,2 heat radiations of a metal body, and not need the bigger heat abstractor of complex structure volume.

Other adopts the bypass circuit, even one of them LED damages, it is luminous also not influence other LED, reduces maintenance frequency.

Shown in Figure 11,12, " be that a plurality of modules are assembled, module is provided with the projection and the draw-in groove that can connect falcon with other module to fixed head 3 of the present invention, and this module can be cambered surface and also can be the plane.During use, desire to regulate earlier the distance of LED and convex lens, and be installed in the installing hole of module, the root a tree name need connect together plurality of modules to the LED number.

Convex lens of the present invention can adopt 13 groups of (at 25 LED of a row) different scattering angle lens, as long as install the lens of different scattering angles additional before LED according to different irradiating angles.

Claims

1. one kind is the means of illumination of light source with LED, is installed on the LED fixed head LED is intensive, it is characterized in that: comprise following step:

2. LED means of illumination as claimed in claim 1, it is characterized in that: the light that sends as LED crosses earlier and afterwards disperses when forming hourglass shape, the pass of its irradiation distance and angle is: illumination length L=(y+y1)/sin α, wherein y is the distance at lighting unit center of the lighting unit Center-to-Center LED correspondence of a certain LED correspondence, and y1 is the spacing of this LED and center LED.

3. LED means of illumination as claimed in claim 1, it is characterized in that: when the light that sends as LED is dispersed and is fan-shaped, the pass of its irradiation distance and angle is: illumination length X=(N-M)/sin α, wherein N is the distance at lighting unit center of the lighting unit Center-to-Center LED correspondence of a certain LED correspondence, and M is the spacing of this LED and center LED.

4. LED means of illumination as claimed in claim 1 is characterized in that: described lighting device adopts drive circuit control to be added in the voltage and current on the LED and controls the bright lamp number of LED.

5. LED means of illumination as claimed in claim 1 is characterized in that: the voltage that is added in LED is dc pulse voltage.

6. one kind is the lighting device of light source with LED, comprise LED and LED fixed head, form array on the intensive LED of the being installed in fixed head of LED, it is characterized in that: described each LED forms certain setting angle with the LED fixed head so that the illumination that LED sends is mapped to its corresponding lighting unit, be provided with convex lens in LED the place ahead, LED at one times of focal length of convex lens between the two focus length and between the two apart from adjustable.

7. LED lighting device as claimed in claim 6 is characterized in that: described LED and convex lens are divided into two distances and can regulate mutually in the body, and this body is folded in the installing hole of fixed head.

8. LED lighting device as claimed in claim 7 is characterized in that: described body is provided with for outwards disperseing, and the light path that LED is sent is fan-shaped.

9. LED lighting device as claimed in claim 7 is characterized in that: described body presents the convergent manner setting, and described LED light path is the hourglass shape.

10. LED lighting device as claimed in claim 6 is characterized in that: described LED fixed head is provided with the installing hole of different angles for dull and stereotyped on flat board.

11. LED lighting device as claimed in claim 7 is characterized in that: described LED fixed head is for dull and stereotyped, and described installing hole is arranged on the LED fixed head, is not provided with the coupling that is provided with different angles between the body of LED and installing hole on the same group.

12. LED lighting device as claimed in claim 6 is characterized in that: described fixed head is spliced by plurality of modules, described module is provided with the projection and the draw-in groove that can connect with other module falcons.

13. one kind is the lighting device of light source with LED, comprise LED and LED fixed head, form array on the intensive LED of the being installed in fixed head of LED, it is characterized in that: described each LED forms certain setting angle with the LED fixed head so that the illumination that LED sends is mapped in its corresponding lighting unit, and each LED goes up and is provided with different scattering angle lens by setting angle.