CN102755695B - Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity - Google Patents
Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity Download PDFInfo
- Publication number
- CN102755695B CN102755695B CN201210244215.9A CN201210244215A CN102755695B CN 102755695 B CN102755695 B CN 102755695B CN 201210244215 A CN201210244215 A CN 201210244215A CN 102755695 B CN102755695 B CN 102755695B
- Authority
- CN
- China
- Prior art keywords
- light source
- light
- length
- bin
- curved surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention provides a method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity, comprising the following steps of: (1) selecting light sources and a light source layout mode; (2) measuring a light intensity-distance relation of the light sources; (3) determining the illumination distance of the light sources; (4) determining the number of the light sources according to the needed light intensity and a needed illumination distance; (5) determining the curvature change range of the light source installation panel according to the characteristics of a light source installation panel, selecting a proper curvature and a proper curvature radius, and calculating an arc length of a curved surface element, wherein the curved surface element has a first length; (6) determining the length of the curved surface element according to the size of a needed illumination area; (7) connecting a panel surface element to one end of the curved surface element; and (8) determining the number of unit surface elements according to the size of the needed illumination area. With the adoption of the method, the illumination area is larger than that of a laser, the light intensity can reach the experimental requirements, the shape of the curved surface of the light source installation panel can be changed according to the requirements, and the light intensity is changed within a certain range, so that the applicability of the light source installation panel is strong.
Description
Technical field
The present invention relates to a kind of method, refer to especially and a kind ofly realize LED area light source area and the variable method of light intensity.
Background technology
Photodynamic therapy (Photodynamic Therapy, PDT) former title photoradiation therapy, photochemotherapy, be utilize the light of specific wavelength to be radiated on certain photoactive substance, then produce the reactions such as a series of chemistry, physics, biology with a kind of method for the treatment of malignant tumor and various benign disease.The factor affecting PDT mainly contains photosensitizer, light source and tissue oxygen concentration.In photodynamic therapy, the photosensitizer used is only under the irradiation being subject to special wavelength light, ability resonant excitation forms the photosensitizer of excited state, namely the light biochemical reaction in inducing cell is excited with the monochromatic light of doses, sensitiser absorption light energy is excited, and forms excited triplet state photosensitizer.These excited state triplet state photosensitizer are by with tissue substrate or hydrogen atom or electron interaction or directly by energy trasfer oxygen supply, produce some oxygen activity molecules (Radical Oxygen Species, ROS), ROS carrys out attack cells structure by Oxidation, this damage may be the oxidative damage of cell membrane or albumen, when the accumulation of oxidative damage exceedes certain threshold value, cell just starts death.But irradiation exists certain dependence in the light dosage of cell to the amount generating oxide and singlet oxygen in cell, the too little meeting of irradiation light dose causes the efficiency of PDT to decline, and light dosage is too large be can not be ignored again Normocellular damage.Therefore, the optical wavelength that light source sends, luminous power size and illumination methods etc. all affect cell or biological tissue's photodynamic effect under light illumination, thus affect the effect of photodynamic therapy.Simultaneously, test under remaining on identical experiment condition to make same group, each position of hot spot should keep identical luminous power, the i.e. uniformity of hot spot, so the area of hot spot that sends of light source and the luminous power uniformity, the carrying out and experimental data impact probing into photodynamic reaction also be can not be ignored.
And need to use light source in the photodynamic therapy used at present, the light source used at present is laser instrument or LED light source, although but laser instrument monochromaticity is good, energy is high, its light source illuminating area is little, expensive; Although the LED light source monochromaticity of existing specific wavelength is good, low price, irradiated area can be built voluntarily according to the demand of oneself, and light intensity does not often reach requirement of experiment.
Summary of the invention
The present invention proposes a kind ofly to realize LED area light source area and the variable method of light intensity, and solve light intensity in prior art and do not reach requirement of experiment, its light intensity can experimentally require and arbitrarily change.
Technical scheme of the present invention is achieved in that
Realize LED area light source area and the variable method of light intensity, comprise the steps:
(1) select light source and source layout's mode, described light source has a source diameter;
(2) light intensity-distance relation of described light source is measured;
(3) luminous range of described light source is determined;
(4) according to intensity of illumination and luminous range, the number of described light source is determined;
(5) determine its Curvature varying scope according to the characteristic of light source installation panel, selected curvature and radius of curvature, calculate the arc length of curved surface bin, described curved surface bin has the first length;
(6) according to the size of illuminating area, described first length is determined;
(7) a plane bin is connected in one end of described curved surface bin, described plane bin has the first width and the second length, described first width is greater than one times of diameter of described light source, and be less than two times of diameters of described light source, described second length is consistent with described first length, described curved surface bin and described plane bin connect and compose a unit bin, and described unit bin has the second width, and described second width is chord length corresponding to described arc length and described first width sum;
(8) according to the size of illuminating area, the number of unit bin is determined.
Further, described light source is LED lamp bead.
Further, described light source installation panel is cylinder, and it has the first thickness.
Further, described light source installation panel has the first height, and described first is highly not less than the first predetermined threshold value.
Further, the half of described first predetermined threshold value is the product of the tangent of described luminous range and described smooth angle of divergence half.
It is larger than laser instrument illuminating area that the present invention realizes illuminating area, and light intensity can reach requirement of experiment again, can change the curve form of light source installation panel according to actual requirement, and can continuously change light intensity within the specific limits, the suitability is stronger.The present invention selects material that mechanicalness is good as light source installation panel, and is provided with the support of the curvature of corresponding supporting change this kind of light source installation panel, just can realize the irradiated area and the light intensity that change this light source flexibly; According to actual needs, light source installation panel is made required curvature and area, be arranged on by light source on light source installation panel, the first thickness of light source installation panel is advisable not block LED light.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the step schematic diagram that the present invention realizes LED area light source area and the variable method of light intensity.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1, a kind ofly realize LED area light source area and the variable method of light intensity, comprise the steps: that (1) selects light source and source layout's mode according to actual needs, described light source has a source diameter; (2) light intensity-distance relation of described light source is measured; (3) luminous range of described light source according to actual needs, is determined; (4) according to required intensity of illumination and luminous range, the number of described light source is determined; (5) determine its Curvature varying scope according to the characteristic of light source installation panel, selected suitable curvature and radius of curvature, calculate the arc length of curved surface bin, described curved surface bin has the first length; (6) according to the size of required illuminating area, described first length is determined; (7) a plane bin is connected in one end of described curved surface bin, described plane bin has the first width and the second length, described first width is greater than one times of diameter of described light source, and be less than two times of diameters of described light source, described second length is consistent with described first length, described curved surface bin and described plane bin connect and compose a unit bin, and described unit bin has the second width, and described second width is chord length corresponding to described arc length and described first width sum; (8) according to the size of required illuminating area, the number of unit bin is determined.The number of unit bin is that the width of required illuminating area adds 1 again divided by the second width.First length is two times that the length of required illuminating area adds a half-tangent of the light source angle of divergence and the product of luminous range.
The definition of the light angle of divergence: light source is A1 from outgoing mirror emergent light spot size, is A2 through a segment distance spot size, calculates hot spot variable quantity with A2-A1, uses trigonometric function just can calculate the dispersion angle of light source.And the present invention selects material that mechanicalness is good as light source installation panel, and be provided with the support of the curvature of corresponding supporting change this kind of light source installation panel, realize the irradiated area and the light intensity that change this light source flexibly.
Further, described light source is LED lamp bead.Described light source installation panel is provided with multiple through hole, and described LED lamp bead correspondence is fixed in through hole.
Further, described light source installation panel is cylinder, and it has the first thickness.Described first thickness is advisable not block LED pearly-lustre, and staff can experimental demand be arranged.
Further, described light source installation panel has the first height, and described first is highly not less than the first predetermined threshold value.
Further, the half of described first predetermined threshold value is the product of the tangent of described luminous range and described angle of divergence half.
In use, first select light source and source layout's mode according to actual needs, described light source has a source diameter and intensity of illumination, and source layout's mode is advisable can form uniform illumination in the present invention, light intensity-the distance relation of described light source is measured with light power meter, experimentally need, staff determines the luminous range of described light source, according to required intensity of illumination and luminous range, determine the number of described light source, its Curvature varying scope is determined according to the characteristic of light source installation panel, selected suitable curvature, radius of curvature corresponding to general curvature must be greater than the distance of light source to required plane of illumination, according to the radius of curvature of correspondence, the computing formula of arc length, calculate the arc length of curved surface bin, described curved surface bin has the first length, according to the size of required illuminating area, determine described first length, a plane bin is connected in one end of described curved surface bin, described plane bin has the first width and the second length, described first width is greater than one times of diameter of described light source, and be less than two times of diameters of described light source, described second length is consistent with described first length, described curved surface bin and described plane bin connect and compose a unit bin, described unit bin has the second width, the length of actual illuminating area adds that the second width equals the first length, described second width is chord length corresponding to described arc length and described first width sum, again according to actual illuminating area needs, actual light is the 3rd width according to width, 3rd width adds one again divided by the second width, the number of the unit bin needed exactly, according to the size of required illuminating area, determine the number of unit bin, again according to data such as curvature, curved surface bin, plane bins, produce the light source installation panel suited the requirements, light source is arranged on above described light source installation panel.The centrage being arranged on all light sources on curved mounting surface plate just can in the round territory that can to arrive with the product of the tangent of described luminous range and described angle of divergence half be the center of circle, described luminous range place when not needing to adjust.
When staff has other experiment demand, when namely needing to change surface of light source sum light intensity, only need adjust parameters such as the quantity of the flexibility of light source installation panel, light source, luminous ranges; Therefore LED area light source area and light intensity easily change, easy to use.
The present invention is with wavelength 400-405nm, and diameter 3mm, the light angle of divergence is the LED lamp bead of 35 °, and real present range light source 5cm place intensity of illumination is 10mw is example, according to the light intensity-distance relation (laboratory records, instrument: light power meter) of single LED lamp bead
| Distance (cm) | 0 | 5 | 6 | 7 | 8 | 9 | 10 |
| Luminous power (uw) | 1010 | 345 | 306 | 270 | 226 | 175 | 140 |
First, experimentally requirement, light intensity needs to reach 10mw, according to luminous power distance relation, by calculating, needs the superposition of 29 LED lamp bead; Single LED lamp bead is 15.75mm at the spot radius at distance luminous point 50mm place, and when light source installation panel is bent to certain radius, the light at 29 LED lamp bead centers can arrive round center, and realizing light intensity is 10mw; The light source installation panel of this for polylith curvature is made an entirety, the area source of light intensity within 5% range of error can be formed, the size of illuminating area according to actual needs can determine the height of bin and the number that form area source.Luminous range is l, spot radius is r=l × tan17.5 °, and lamp pearl radius is rl, and actual required light intensity is A, single LED lamp bead is a to the light intensity at this some place, lamp pearl number n=A/a, according to the characteristic of thickness 2mm glass-fiber-plate, choosing radius of curvature is R=142mm, the lamp pearl 7mm apart that lamp pearl is nearest with it, the corresponding center of circle of circular arc is 92mm to the distance of required plane of illumination, and the angle that circle centre position and the tangent radius of this hot spot are formed is 0.339rad, and corresponding arc length is 48.2mm.For guaranteeing the fixing of edge lamp pearl, the arc length of bending glass-fiber-plate part gets 54mm, is the surface plate of 8mm by bending glass-fiber-plate and width, and on the center line of this plate fixed L ED lamp pearl, lamp pearl is 7mm apart.
The distance of cambered surface summit and required illumination plane is set to d, circular arc respective radius is R, the light source angle of divergence is θ, the spot radius size that light source is formed on plane of illumination is d × tan (θ/2), distance of center circle corresponding to circular arc is R-d from the distance of plane of illumination, the angle that circle centre position and the tangent radius of this hot spot are formed is 2 × arctan ((d × tan (θ/2))/(R-d)), so, corresponding arc length size is S=R × 2 × arctan ((d × tan (θ/2))/(R-d)), the arc length of cambered surface bin is slightly larger than S, in solution, angular unit is radian.Its corresponding chord length is: S '=R × sin (arctan ((d × tan (θ/2))/(R-d))), the whole light source n reaching required light intensity at spot center place are arranged in the region that the corresponding circle centre position of the arc length radius tangent with this hot spot follow the intersection point of arc cylinder to be formed according to selected layout type, namely in elliptic region, the number n of light source is actual required intensity of illumination I and the ratio of the light intensity I2 of the corresponding distance to a declared goal of light intensity-distance relation of light source, i.e. n=I/I2.
The half of the arc length of curved surface bin is exactly half axial length of elliptic region major axis, therefore the arc length of cambered surface bin is 2 × rb+lb (lb is small arc length), to ensure the stability that bin edge LED lamp bead is fixing, take lb as 1.5-2mm, its corresponding chord length S ' is tried to achieve by triangle relation formula, for improving the uniform illumination degree of bin contact portion, between two cambered surfaces, be greater than with wide d1 the plane that 2 × rl is less than 4 × rl connect, this plane and cambered surface component unit bin, horizontal width the d2=S '+d1 of unit bin, (in the middle of this example, the horizontal length of unit bin is 53.67mm+8mm) length of approaches uniformity illumination part is positioned at the part folded by LED lamp bead illumination centrage in cambered surface for curved surface two ends, width s1 according to actual required illuminating area decides the bin number n=s1/d2+1 forming LED lamp bead place curved surface, bin determines the height of lamp pearl place arc cylinder according to actual required illuminating area length D, the height of arc cylinder is the first length, h=D+2 × r, the area source of uniform intensity degree within 5% range of error can be formed in the area of s1 × D, the light intensity that error is weaker than unit bin centerline mainly due to the light intensity in two unit plane unit junctions causes.
The luminous median perpendicular of LED lamp bead is in this curved surface, in the plane parallel with this curved surface tangent plane, the LED lamp bead of edge arrives the light intensity of this plane and asymmetric, and outer light intensity is greater than the one side near the plane of symmetry, and this also improves the uniformity of light intensity to a certain extent.And LED lamp bead is fixed on that there is certain curvature, that thickness is suitable light source installation panel, the curvature of light source installation panel by actual needs LED lamp bead the illumination angle of divergence, light intensity and distance relation, need the distance of plane of illumination and light source jointly to determine.
It is larger than laser instrument illuminating area that the present invention realizes illuminating area, and light intensity can reach requirement of experiment again, can change the curve form of light source installation panel according to actual requirement, and can continuously change light intensity within the specific limits, the suitability is stronger.The present invention selects material that mechanicalness is good as light source installation panel, and is provided with the support of the curvature of corresponding supporting change this kind of light source installation panel, just can realize the irradiated area and the light intensity that change this light source flexibly; According to actual needs, light source installation panel is made required curvature and area, be arranged on by light source on light source installation panel, the first thickness of light source installation panel is advisable not block LED light.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. realize LED area light source area and the variable method of light intensity, it is characterized in that, comprise the steps:
(1) select light source and source layout's mode, described light source has a source diameter;
(2) light intensity-distance relation of described light source is measured;
(3) luminous range of described light source is determined;
(4) according to intensity of illumination and luminous range, the number of described light source is determined;
(5) determine its Curvature varying scope according to the characteristic of light source installation panel, selected curvature and radius of curvature, calculate the arc length of curved surface bin, described curved surface bin has the first length h; Wherein, described light source installation panel is cylinder, and it has the first thickness and the first height, and described first is highly not less than the first predetermined threshold value, and the half of described first predetermined threshold value is the product of the tangent of described luminous range and light angle of divergence half;
(6) according to the size of illuminating area, determine described first length h, show that the computing formula of the first length is h=D+2r; Wherein, r is spot radius, and it is the product of the tangent of described luminous range and light angle of divergence half; D is illuminating area length;
(7) a plane bin is connected in one end of described curved surface bin, described plane bin has the first width and the second length, described first width is greater than one times of diameter of described light source, and be less than two times of diameters of described light source, described second length is consistent with described first length, described curved surface bin and described plane bin connect and compose a unit bin, and described unit bin has the second width, and described second width is chord length corresponding to described arc length and described first width sum;
(8) according to the size of illuminating area, the number of unit bin is determined.
2. realize LED area light source area and the variable method of light intensity as claimed in claim 1, it is characterized in that, described light source is LED lamp bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210244215.9A CN102755695B (en) | 2012-07-13 | 2012-07-13 | Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210244215.9A CN102755695B (en) | 2012-07-13 | 2012-07-13 | Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102755695A CN102755695A (en) | 2012-10-31 |
| CN102755695B true CN102755695B (en) | 2015-04-15 |
Family
ID=47050493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210244215.9A Active CN102755695B (en) | 2012-07-13 | 2012-07-13 | Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102755695B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2360459B (en) * | 2000-03-23 | 2002-08-07 | Photo Therapeutics Ltd | Therapeutic light source and method |
| KR101081360B1 (en) * | 2009-03-25 | 2011-11-08 | 한국과학기술연구원 | Photostimulation array apparatus |
| CN101586779B (en) * | 2009-06-18 | 2011-01-05 | 中国计量学院 | Design method of LED homogeneous reflector based on optical extension and use thereof |
| CN101975370B (en) * | 2010-11-01 | 2012-07-04 | 上海铭源光源发展有限公司 | Design method of secondary light distribution lens for LED light source |
| CN201902993U (en) * | 2010-12-02 | 2011-07-20 | 西安中科麦特电子技术设备有限公司 | Novel LED illuminating optical lens |
| CN102287756A (en) * | 2011-08-23 | 2011-12-21 | 中国科学院微电子研究所 | Construction method for curved surface of light emitting diode (LED) light distribution lens and LED light distribution lens |
-
2012
- 2012-07-13 CN CN201210244215.9A patent/CN102755695B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102755695A (en) | 2012-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI613093B (en) | Light irradiation device | |
| US8816301B2 (en) | Lamp and reflector arrangements for apparatuses with multiple germicidal lamps | |
| Shilyagina et al. | LED light source for in vitro study of photosensitizing agents for photodynamic therapy | |
| US8992052B2 (en) | Inner lens optics for omnidirectional lamp | |
| US9482408B2 (en) | Light source for uniform illumination of an area | |
| Chen et al. | Quantum dot light emitting devices for photomedical applications | |
| TWI537524B (en) | Light irradiation device | |
| TWI386591B (en) | Light source apparatus | |
| CN102755695B (en) | Method for realizing variable LED (Light-Emitting Diode) surface light source area and light intensity | |
| CN104832798A (en) | Led illumination apparatus | |
| WO2022147878A1 (en) | Collimation-type water disinfection and purification apparatus | |
| CN101032399A (en) | Combined high-efficiency light irradiation system | |
| EP4095884A1 (en) | Ultraviolet ray irradiation device | |
| Lee et al. | High uniformity and tolerance design for direct-lit LED backlight illumination using Lagrange interpolation | |
| JP2012104469A (en) | Light uniformization structure and light emitting module | |
| RU2661329C1 (en) | Luminaire | |
| Meerovich et al. | Devices for photodynamic studies based on light-emitting diodes | |
| US9706609B2 (en) | Large area high-uniformity UV source with many small emitters | |
| JP6518375B1 (en) | LED lighting device and plant cultivation shelf | |
| CN202691903U (en) | Light distribution lens of landscape lamp using integrated planar LED (light emitting diode) as light source | |
| Bai et al. | Research on illumination uniformity in edible mushrooms incubator with genetic algorithm | |
| CN104198383A (en) | Multi-light-path near-ultraviolet simulator | |
| CN216927277U (en) | Device for improving UV irradiation uniformity | |
| ES2401101T3 (en) | Irradiation device to irradiate a human body | |
| Homsirikamol et al. | Validation of uniformity-optimized irradiance distribution on a well-plate platform from a light-emitting-diode array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |