CN101382264A - LED illuminating apparatus and regulation method for using illumination homogeneity thereof - Google Patents
LED illuminating apparatus and regulation method for using illumination homogeneity thereof Download PDFInfo
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- CN101382264A CN101382264A CNA2008102185079A CN200810218507A CN101382264A CN 101382264 A CN101382264 A CN 101382264A CN A2008102185079 A CNA2008102185079 A CN A2008102185079A CN 200810218507 A CN200810218507 A CN 200810218507A CN 101382264 A CN101382264 A CN 101382264A
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Abstract
The invention provides an LED illumination device, comprising a plurality of LEDs, a spherical bearing surface and a condensing lens; a plurality of LEDs are fixedly arranged on the spherical bearing surface and point at the spherical center of the spherical bearing surface; the condensing lens is arranged before the LEDs; furthermore, a plurality of LEDs, the condensing lens and subsequent optical systems are sequentially connected by optical paths. The invention also provides an adjusting method used for illumination uniformity of the LED illumination device; optical energy emitted by all LEDs are changed by adjusting the input power of all LEDs, thus adjusting the uniformity of output illuminance of the illumination device further. The LED illumination device and the adjusting method have the advantages of high brightness and simple illuminance adjustment, can replace mercuric bulbs to be directly applied to illumination of projectors or other instruments, and have wide usage range.
Description
Technical field
The present invention relates to lighting technical field, the method for adjustment of particularly a kind of LED lighting device and illumination uniformity thereof.
Background technology
In recent years, along with the high-power and high-luminance LED technology rapid development, LED as the application of a kind of long-life novel environment friendly light source in lighting field more and more widely.Compare with high tension mercuric bulb commonly used, it is low that led light source possesses operating voltage, and power consumption is little, and emission response time is extremely short, and is photochromic pure, sound construction, and shock resistance, vibration resistance, stable and reliable for performance, in light weight, volume is little, low cost and other advantages, its development is advanced by leaps and bounds.The excitation of led light source is high, can improve the color developing of instrument, shows the field at image, and the gamut range of image is more than using the high tension mercuric bulb broadness.LED need can not realize high-speed starting and shutdown fast through the start preheating and shutdown energising heat radiation process of high tension mercuric bulb, and therefore, LED certainly will fully develop talents as a kind of new type light source that replaces high-pressure mercury-vapor lamp.
Yet the brightness of present single LEDs is also lower, and high-power LED also can only be accomplished tens lumens, can't compare with high tension mercuric bulb commonly used, and the latter's brightness has hundreds of to arrive several kilolumens.Therefore, the Combination Design of various application LED is arisen at the historic moment, but mainly concentrate on street lighting, traffic lights and the household lamp aspect (bulb or fluorescent tube) used always, it is designed that its luminous energy hot spot distribution or profile are its specific purposes, can not be directly used in projecting apparatus or the scientific instrument.At present projecting apparatus or scientific instrument are still widely used is lighting bulb such as electrion mercury, and bulb is furnished with reflector, and light energy is converged to certain place a bit before the bulb, is transferred in the follow-up lamp optical system and goes.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of LED lighting device that can replace electrion mercury bulb to directly apply to projecting apparatus or Other Instruments device illumination is provided.
Another object of the present invention is to provide a kind of control method of illumination uniformity of the LED of being used for lighting device.
The present invention is achieved through the following technical solutions: a kind of LED lighting device, comprise a plurality of LED, spherical, collector lens, described a plurality of LED is fixedly mounted on the spherical, and the sphere centre of sensing spherical, collector lens is arranged on described a plurality of LED front, and the light path connection successively of described a plurality of LED, collector lens and subsequent optical system.
Described LED can be the LED that the LED of high-power type, common plug-in type LED or employing SMD mount, and adopts the optically transparent material encapsulation with converging light energy.
Described collector lens can be a sphere or aspheric positive lens, and the incident end of subsequent optical system places near the light beam convergent point place of this collector lens or its, and the incident port that does not exceed the subsequent optical system with light beam is advisable.
Described collector lens also can be the lens arra that a plurality of lenslets corresponding with LED are formed, lens arra is corresponding with LED and place between spherical inside, LED and the sphere centre, the incident end of subsequent optical system places near this sphere centre place or its, and the incident port that does not exceed the subsequent optical system with light beam is advisable.
Described lens arra can be attached at the spherical inner surface, also can maintain certain distance with the inner surface of spherical, and prerequisite is the light beam that sends of LED converges at spherical through the focusing of lens arra centre of sphere place.
Each lenslet is that absolute construction form or whole lens arra are overall structure form in the described lens arra; Described lens arra and spherical can be relatively independent structure, also can be an overall structure.
Can be provided with the reflex reflector of surface reflection or internal reflection structure around the described LED, this reflex reflector is one directly to be arranged at the reflectance coating on the spherical or to attach to the interior reflective surface of collector lens, its effect is that light beam with LED radiation towards periphery is to front-reflection, constitute the light beam catadioptric with collector lens and receive photosystem, reach the purpose of focused light energy.
Described sphere centre is provided with second collector lens, and the plane of incidence of described second collector lens scribbles fluorescent material; The light beam irradiates that fluorescent material sends at LED excites the light beam that sends down required wavelength again, and this light beam enters in the subsequent optical system after through the convergence of second collector lens again, thereby improves the light beam service efficiency.
A kind of LED lighting device of the present invention, its course of work is: a plurality of LED that are installed on the spherical launch light beam simultaneously, through the centre of sphere place of collector lens post-concentration to spherical, incide in the follow-up optical system again.
The present invention also provides a kind of method of adjustment that is used for the illumination uniformity of above LED lighting device, changes the light energy that each LED sends by the input power of adjusting each LED, and then adjusts the uniformity of this lighting device output illuminance; Make the LED input power that is positioned at the centre low such as adjusting, its light energy of sending is also less relatively, and be positioned at the LED input power height at edge, its light energy of sending is also more relatively, thereby adjust the uniformity of this lighting device output illuminance, change the dark situation of center bright limb that the single source illumination is occurred.
Compared with prior art, the present invention has following beneficial effect: a kind of LED lighting device of the present invention, the light beam that a plurality of LED are sent converges to a bit or a hot spot, incide in the follow-up optical system, overcome the low shortcoming of single led brightness, and can regulate brightness by the number of regulating the LED that uses; By giving each LED input different power, can improve the uniformity of output illuminance.This device can replace electrion mercury bulb be directly used in projecting apparatus or Other Instruments equipment illumination, applied range.
Description of drawings
Fig. 1 is the structural representation of a kind of LED lighting device of the present invention embodiment 1.
Fig. 2 is the structural representation of a kind of LED lighting device of the present invention embodiment 2.
Fig. 3 is the structural representation of a kind of LED lighting device of the present invention embodiment 3.
Fig. 4 is the structural representation of a kind of LED lighting device of the present invention embodiment 4.
Fig. 5 is the structural representation of a kind of LED lighting device of the present invention embodiment 5.
Fig. 6 is the structural representation of a kind of LED lighting device of the present invention embodiment 6.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
The LED that adopts in following examples is the LED that the LED of high-power type, common plug-in type LED or employing SMD mount, and adopts the optically transparent material encapsulation with converging light energy; A plurality of LED can all launch white light or all launch monochromatic light, and also the light of each spontaneous emission different wave length mixes.Adopt the incident end of light pipe as the subsequent optical system.
A kind of LED lighting device as shown in Figure 1, comprises a plurality of LED2, spherical 1, collector lens 3, and a plurality of LED2 point to sphere centre 4 and are fixedly mounted on the spherical 1, and the LED2 front sets gradually collector lens 3 and light pipe 5 by the light path order; Collector lens 3 is and a plurality of one to one independently lenslets of LED2, be positioned at the front of LED2, the light that LED2 is sent focuses on the centre of sphere place of spherical 1, collector lens 3 can be attached at the inner surface of spherical 1, also can certain distance be arranged, as long as the centre of sphere place that this collector lens 3 can realize the light beam that LED2 sends is focused on spherical 1 with spherical 1.
Each Shu Guang that LED2 launches is through corresponding lens post-concentration is to sphere centre 4 places in the collector lens 3, and the incident end by light pipe 5 enters light pipe 5 again.
A kind of LED lighting device as shown in Figure 2, is with the difference of embodiment 1 that collector lens 31 is the lens arra that a plurality of lenslets corresponding with LED2 are formed, and this lens arra is an overall structure.
A kind of LED lighting device as shown in Figure 3, is with the difference of embodiment 2 that spherical 11 is a monolithic construction with collector lens 32, and total adopts transparent optical material directly to suppress manufacturing by mould, can reduce manufacturing cost.
A kind of LED lighting device, as shown in Figure 4, be with the difference of embodiment 2, be provided with reflex reflector around the LED2, this reflex reflector is one directly to be arranged at the reflectance coating 6 on the spherical 1, constitutes the light beam catadioptrics with collector lens 31 and receives photosystems, and its effect is that light beam with LED2 radiation towards periphery is to front-reflection, converge to sphere centre 4 through collector lens 31 then, thereby reach the purpose that makes full use of the light energy that LED2 sends.
A kind of LED lighting device, as shown in Figure 5, the difference with embodiment 1 is that collector lens 33 is for placing a positive lens of spherical 1 inside, LED2 sends this positive lens post-concentration of light beam process in focus point 7 places, and the incident end of light pipe 5 is arranged on focus point 7 places.
A kind of LED lighting device, as shown in Figure 6, be with the difference of embodiment 1, sphere centre 4 places are provided with second collector lens 8, and then light pipe 5 is set, and on the plane of incidence 81 of second collector lens 8, scribbling fluorescent material, the light beam irradiates that fluorescent material sends at LED excites the light beam that sends required wavelength down again, enter in the light pipe of subsequent optical system after the convergence of this light beam through second collector lens 8, use fluorescent material again stimulated luminescence can improve the optical efficiency of system.
A kind of inhomogeneity method of adjustment of LED lighting device lighting that is used for above each embodiment changes the light energy that each LED sends by the input power of adjusting each LED, and then adjusts the uniformity of this lighting device output illuminance; Make the LED input power that is positioned at the centre low such as adjusting, its light energy of sending is also less relatively, and be positioned at the LED input power height at edge, its light energy of sending is also more relatively, thereby adjust the uniformity of this lighting device output illuminance, change the dark situation of center bright limb that the single source illumination is occurred.
As mentioned above, just can realize the present invention preferably, the foregoing description is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Be that all equalizations of doing according to content of the present invention change and modification, perhaps reconfiguring all of different embodiment contained by claim of the present invention scope required for protection.
Claims (10)
1, a kind of LED lighting device, it is characterized in that, comprise a plurality of LED, spherical, collector lens, described a plurality of LED is fixedly mounted on the spherical, and the sphere centre of sensing spherical, collector lens is arranged on described a plurality of LED front, and the light path connection successively of described a plurality of LED, collector lens and subsequent optical system.
2, LED lighting device according to claim 1 is characterized in that, described LED is the LED that the LED of high-power type, common plug-in type LED or employing SMD mount, and described LED adopts the optically transparent material encapsulation with converging light energy.
3, LED lighting device according to claim 1 is characterized in that, described collector lens is a sphere or aspheric positive lens; The incident end of described subsequent optical system places near the light beam convergent point place of this collector lens or its, and described light beam does not exceed the incident port of subsequent optical system.
4, LED lighting device according to claim 1 is characterized in that, described collector lens is the lens arra that a plurality of lenslets corresponding with LED are formed, the corresponding inside that places spherical with LED of lens arra; The incident end of described subsequent optical system places near described sphere centre place or its, and described light beam does not exceed the incident port of subsequent optical system.
5, LED lighting device according to claim 4 is characterized in that, it is the inner surface that lens arra is attached at spherical that described lens arra places the mode of spherical inside.
6, LED lighting device according to claim 4 is characterized in that, each lenslet is that absolute construction form or whole lens arra are overall structure form in the described lens arra; Described lens arra and spherical are a relatively independent structure or an overall structure.
7, LED lighting device according to claim 1 is characterized in that, is provided with reflex reflector around the described LED, and this reflex reflector is one directly to be arranged at the reflectance coating on the spherical or to attach to the inner reflection surface of collector lens.
8, LED lighting device according to claim 1 is characterized in that, described sphere centre is provided with second collector lens, and the plane of incidence of described second collector lens scribbles fluorescent material.
9, a kind of method of adjustment that is used for the illumination uniformity of each described LED lighting device of claim 1～8, it is characterized in that, change the light energy that each LED sends by the input power of adjusting each LED, and then adjust the uniformity of this lighting device output illuminance.
10, the method for adjustment of the illumination uniformity of LED lighting device according to claim 9, it is characterized in that, describedly change the light energy that each LED sends by the input power of adjusting each LED, specifically being meant to regulate makes the LED input power that is positioned at the centre low, its light energy of sending is less relatively, be positioned at the LED input power height at edge, its light energy of sending is more relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102185079A CN101382264A (en) | 2008-10-21 | 2008-10-21 | LED illuminating apparatus and regulation method for using illumination homogeneity thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102185079A CN101382264A (en) | 2008-10-21 | 2008-10-21 | LED illuminating apparatus and regulation method for using illumination homogeneity thereof |
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| CN101382264A true CN101382264A (en) | 2009-03-11 |
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| CNA2008102185079A Pending CN101382264A (en) | 2008-10-21 | 2008-10-21 | LED illuminating apparatus and regulation method for using illumination homogeneity thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713030A (en) * | 2014-12-02 | 2015-06-17 | 上海理鑫光学科技有限公司 | Spherical surface LED array condensation system |
| CN107813050A (en) * | 2017-11-23 | 2018-03-20 | 中国科学院重庆绿色智能技术研究院 | A kind of multi-laser beam 3D printing head for metal melting rapid shaping |
| CN109519724A (en) * | 2018-11-13 | 2019-03-26 | 刘丹丹 | A kind of LED light |
-
2008
- 2008-10-21 CN CNA2008102185079A patent/CN101382264A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713030A (en) * | 2014-12-02 | 2015-06-17 | 上海理鑫光学科技有限公司 | Spherical surface LED array condensation system |
| CN107813050A (en) * | 2017-11-23 | 2018-03-20 | 中国科学院重庆绿色智能技术研究院 | A kind of multi-laser beam 3D printing head for metal melting rapid shaping |
| CN109519724A (en) * | 2018-11-13 | 2019-03-26 | 刘丹丹 | A kind of LED light |
| CN109519724B (en) * | 2018-11-13 | 2021-03-12 | 深圳市永吉光电科技有限公司 | LED lamp |
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Open date: 20090311 |