CN204286599U - A kind of LED color vector measuring device - Google Patents
A kind of LED color vector measuring device Download PDFInfo
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- CN204286599U CN204286599U CN201420717355.8U CN201420717355U CN204286599U CN 204286599 U CN204286599 U CN 204286599U CN 201420717355 U CN201420717355 U CN 201420717355U CN 204286599 U CN204286599 U CN 204286599U
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Abstract
The utility model discloses a kind of LED color vector measuring device, comprise connect successively spectrometer, ganged movement test platform, motion-control module and constant-current control module, PC; PC is by motion-control module load position data; Spectrometer reads colour temperature data and is transferred to PC; Ganged movement test platform connects detector moving module, polar angle mobile module, position angle mobile module respectively; Ganged movement test platform comprises position angle rotation platform, polar angle rotation platform and detector moving platform, and realizes ganged movement by motion-control module; Position angle rotation platform comprises the position angle rotation platform with a synchronous pulley rotating mechanism (1), and position angle rotation platform is provided with through hole (3), and through hole (3) is for installing the fixture being loaded with LED component; Position angle rotation platform has a boss (4), boss (4) is provided with the holding screw (2) of the axial location for adjusting fixture.
Description
Technical field
The utility model relates to LED fields of measurement, particularly relates to a kind of LED color vector measuring device.
Background technology
Light emitting diode (LED) as the lighting source of a new generation compared with the conventional light source such as incandescent lamp, there is life-span long, the advantage such as light efficiency is high, energy-conserving and environment-protective, cause the concern of more and more manufacturer and research institution, its research emphasis is to improve the luminescence efficiency of LED light source and color quality as luminous flux, brightness, colour rendering index etc.In addition, the color homogeneity problem of white light LEDs also more and more comes into one's own, but still lacks effective color homogeneity evaluation criterion and method of testing in industry.
At present, researcher and manufacturer using the colour temperature recorded under fixed range with angular distribution curve as the foundation evaluating LED light source color homogeneity.But in fact, along with the change of observer and LED light source distance, the color experienced at equal angular place also can be distinguished to some extent, also therefore the color homogeneity of LED light source at different distance place also can difference to some extent.Therefore the color temperature distribution curve obtained under this fixed range comparatively intactly can not describe the color distribution of LED light source, the color homogeneity evaluation drawn also is unilateral.
In addition, now increasing researcher and manufacturer improve the color homogeneity of LED light source by improving the chip structure of LED, fluorescent powder pattern and packing forms, and the color temperature distribution curve obtained under fixed range in the past only can be reflected in the color distribution situation of LED light source in a certain sphere, but can not follow the trail of this color how to obtain from LED light source, therefore test result is difficult to use in the structure instructing and improve LED component.
To sum up, existing specification and regulation are difficult to the color distribution of complete description light source colour, and be also difficult to the evaluation requirement meeting light source colour homogeneity, meanwhile, the disappearance of relevant test method and testing tool also brings great inconvenience to research work.
Summary of the invention
The purpose of this utility model is the shortcoming and defect overcoming above-mentioned prior art, provides a kind of LED color vector measuring device.It is based on existing testing apparatus, add the linkage function of detection range in test process, different with angular distribution method of testing from set a distance colour temperature in the past, intuitively can show the color vector of LED light source at solid space, obtain LED color " flowing " direction in space comparatively easily.Its far-field results can for evaluating the color homogeneity of LED light source on measuring distance direction further, and near-field results can be used for instructing further improving LED device structure.
The utility model is achieved through the following technical solutions:
A kind of LED color vector measuring device, comprise connect successively spectrometer, ganged movement test platform, motion-control module and constant-current control module, PC; PC is by motion-control module load position data; Spectrometer reads colour temperature data and is transferred to PC;
Ganged movement test platform connects detector moving module, polar angle mobile module, position angle mobile module respectively;
Wherein, ganged movement test platform comprises position angle rotation platform, polar angle rotation platform and detector moving platform, and realizes ganged movement by motion-control module;
Position angle rotation platform comprises the position angle rotation platform with a synchronous pulley rotating mechanism 1, and position angle rotation platform is provided with through hole 3, and through hole 3 is loaded with the fixture of LED component for installing; Position angle rotation platform has a boss 4, boss 4 is provided with the holding screw 2 of the axial location for adjusting fixture;
During test, the fixture being loaded with LED component is arranged on the through hole 3 of position angle rotation platform, is adjusted the axial location of fixture, utilize synchronous pulley rotating mechanism 1 to realize the azimuthal 360 ° of rotations of LED component by the holding screw 2 adjusting boss 4.
Boss 4 diameter is 30mm.Through hole 3 has three and runs through boss 4, in 120 ° of arrangements; Through hole 3 is the threaded hole of 1.5mm.
A kind of LED color vector method of testing, comprises the steps:
By PC parameter preset transmission command to constant-current control module, light LED light source, polar angle is made to rotate to 180 ° from 0 ° by ganged movement test platform, interval different angles measure color temperature value, PC judges whether LED measuring distance and position angle meet preset value respectively, if do not meet, then repeat previous step;
If meet PC preset value, then position angle is identical, the LED colour temperature under different measuring distance is carried out dividing into groups with polar angle change curve and is drawn in same polar coordinate system; Subsequently the colour temperature in each group with polar angle change curve, be that separation divides some intervals with crest, counterclockwise the interval of same curves be numbered.To measure near field color vector, then the data coordinates on the same interval of same curves recorded near field is by colour temperature increasing numbering, and detection range is different and number identical coordinate points and be connected, and obtains near field colour temperature set of vectors; To measure far field color vector, first in the same set, calculating the average color temperature difference between different detection range and setting color tolerance difference.Wherein, under the average color temperature difference equals same orientation angle, the colour temperature mean difference of each curve at identical polar angle place of different measuring distance, its expression formula is:
(formula 1)
In above formula, θ is polar angle;
for position angle; S1 and s2 is measuring distance; N is test data total amount; T is colour temperature, unit K.
Color tolerance is that the correlativity of gained colour temperature under different measuring distance judges parameter, with the colour temperature in a certain measuring distance for judgment standard, if the color temperature value size in next measuring distance drops within the scope of color tolerance, then judge that this place's colour temperature is relevant to the colour temperature in a upper measuring distance, benchmark colour temperature is connected with correlated colour temperature can obtain color vector, and the expression formula of color tolerance is:
(formula 2)
In above formula, δ is color tolerance coefficient, relevant with color vector precision, and span is 0 to 1;
Connect colour temperature with coordinate points polar angle change curve meeting color tolerance scope, obtain far field colour temperature set of vectors, then to the mould averaged of far field colour temperature vector divided by measuring distance scope, just obtain color vector uniformity index; Color vector homogeneity describe unit testing apart under colour temperature knots modification, further for the color distribution homogeneity of LED light source provides basis for estimation, its expression formula is:
(formula 3)
In above formula, R is color vector homogeneity, unit K/mm;
for at position angle
time color vector; R (s
i, s
i+1) for measuring distance is at s
iand s
i+1between color vector delivery after mean value; Δ s is measuring distance scope.
The utility model, relative to prior art, has following advantage and effect:
It is based on existing testing apparatus, add the function of the detector rectilinear movement in measuring process, different with angular distribution method of testing from set a distance colour temperature in the past, intuitively can show the color vector of LED light source at solid space, obtain LED color " flowing " direction in space comparatively easily.Its far-field results can for evaluating the color homogeneity of LED light source on measuring distance direction further, and near-field results can be used for instructing further improving LED device structure; Means of testing is simple and easy to do;
This device and method can obtain the color vector distribution of LED light source, and further describe the color degree of uniformity of LED light source at detection direction, its near-field results can follow the trail of the different colours light sent from LED light source, thus guidance improves LED device structure.
Accompanying drawing explanation
Fig. 1 is that the utility model hardware system forms schematic diagram;
Fig. 2 is the structural representation of position angle rotation platform;
Fig. 3 is method of testing process flow diagram of the present utility model;
Fig. 4 is the structural representation of detector moving platform;
Fig. 5 is near field color vector distribution plan;
Fig. 6 is far field color vector distribution plan;
Embodiment
Below in conjunction with specific embodiment, the utility model is more specifically described in detail.
Embodiment
As shown in figures 1 to 6.A kind of LED color vector measuring device of the utility model, comprise connect successively spectrometer, ganged movement test platform, motion-control module and constant-current control module, PC; PC is by motion-control module load position data; Spectrometer reads colour temperature data and is transferred to PC;
Ganged movement test platform connects detector moving module, polar angle mobile module, position angle mobile module respectively;
Wherein, ganged movement test platform comprises position angle rotation platform, polar angle rotation platform and detector moving platform, and realizes ganged movement by motion-control module;
Position angle rotation platform comprises the position angle rotation platform with a synchronous pulley rotating mechanism 1, and position angle rotation platform is provided with through hole 3, and through hole 3 is loaded with the fixture of LED component for installing; Position angle rotation platform has a boss 4, boss 4 is provided with the holding screw 2 of the axial location for adjusting fixture;
During test, the fixture being loaded with LED component is arranged on the through hole 3 of position angle rotation platform, is adjusted the axial location of fixture, utilize synchronous pulley rotating mechanism 1 to realize the azimuthal 360 ° of rotations of LED component by the holding screw 2 adjusting boss 4.
Boss 4 diameter is 30mm.Through hole 3 has three and runs through boss 4, in 120 ° of arrangements; Through hole 3 is the threaded hole of 1.5mm.
Detector moving module as shown in Figure 4, the front end of black shadow shield to be arranged on before shadow shield on mounting hole 5, rear end to be arranged on after shadow shield on mounting hole 10, its plate body crosses slide plate gap 7, skateboard component 9 is connected with screw mandrel 6, due to the effect in slide plate gap 7, therefore can realize skateboard component 9 and move along screw mandrel 6 length direction and do not interfere with shadow shield.
As mentioned above.On the basis of existing set a distance colour temperature with angular distribution testing apparatus, increase measuring distance interlocking module, in test process, realize the rotation of 360 °, position angle, polar angle 200 ° rotation, detector 500mm moves linearly; LED light source fixture is flatly arranged in the through hole of position angle rotation platform; LED light source fixture can realize axial roll adjustment; Shadow shield is stamped above roll adjustment screw mandrel.
LED color vector method of testing is as follows:
By PC parameter preset transmission command to constant-current control module, light LED light source, polar angle is made to rotate to 180 ° from 0 ° by ganged movement test platform, interval different angles measure color temperature value, PC judges whether LED measuring distance and position angle meet preset value respectively, if do not meet, then repeat previous step;
If meet PC preset value, then position angle is identical, the LED colour temperature under different measuring distance is carried out dividing into groups with polar angle change curve and is drawn in same polar coordinate system; Subsequently the colour temperature in each group with polar angle change curve, be that separation divides some intervals with crest, counterclockwise the interval of same curves be numbered, be designated as interval one, interval second-class.To measure near field color vector (measuring distance scope is 5mm to 10mm and only need chooses 2 measuring distances), data coordinates on the same interval of same curves then recorded near field is numbered by colour temperature increasing, be designated as 1,2,3 etc., and detection range is different and number identical coordinate points and be connected, obtain near field colour temperature set of vectors; To measure far field color vector, (measuring distance is 50mm to 500mm and chooses 2 ~ 50 measuring distances according to accuracy requirement, precision is higher, far field color vector more can reflect the real space color vector distribution of LED light source), first in the same set, calculate the average color temperature difference between different detection range and set color tolerance difference.Wherein, under the average color temperature difference equals same orientation angle, the colour temperature mean difference of each curve at identical polar angle place of different measuring distance, its expression formula is:
(formula 1)
In above formula, θ is polar angle;
for position angle; S1 and s2 is measuring distance; N is test data total amount; T is colour temperature, unit K.
Color tolerance is that the correlativity of gained colour temperature under different measuring distance judges parameter, with the colour temperature in a certain measuring distance for judgment standard, if the color temperature value size in next measuring distance drops within the scope of color tolerance, then judge that this place's colour temperature is relevant to the colour temperature in a upper measuring distance, benchmark colour temperature is connected with correlated colour temperature can obtain color vector, and the expression formula of color tolerance is:
(formula 2)
In above formula, δ is color tolerance coefficient, relevant with color vector precision, and span is 0 to 1;
Connect colour temperature with coordinate points polar angle change curve meeting color tolerance scope, obtain far field colour temperature set of vectors, then to the mould averaged of far field colour temperature vector divided by measuring distance scope, just obtain color vector uniformity index; Color vector homogeneity describe unit testing apart under colour temperature knots modification, further for the color distribution homogeneity of LED light source provides basis for estimation, its expression formula is:
(formula 3)
In above formula, R is color vector homogeneity, unit K/mm;
for at position angle
time color vector; R (s
i, s
i+1) for measuring distance is at s
iand s
i+1between color vector delivery after mean value; Δ s is measuring distance scope.
As mentioned above.On the basis of conventional set a distance colour temperature with angular distribution method of testing, increase the test event becoming measuring distance, polar coordinates obtain colour temperature under different measuring distance with polar angle, azimuthal variation sphere.It obtains near field color vector by sort method, be used to guide the improvement of LED device structure, and obtain far field color vector by color tolerance method, thus obtain color vector uniformity index, further describe the color homogeneity of LED light source on measurement direction.It is based on existing equipment, adds measuring distance ganged movement module, light-shielding structure and fixture adjust structure vertically, can be widely used in the color vector field tests of various LED.
Embodiment of the present utility model is not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present utility model and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (3)
1. a LED color vector measuring device, is characterized in that: comprise connect successively spectrometer, ganged movement test platform, motion-control module and constant-current control module, PC; PC is by motion-control module load position data; Spectrometer reads colour temperature data and is transferred to PC;
Ganged movement test platform connects detector moving module, polar angle mobile module, position angle mobile module respectively;
Wherein, ganged movement test platform comprises position angle rotation platform, polar angle rotation platform and detector moving platform, and realizes ganged movement by motion-control module;
Position angle rotation platform comprises the position angle rotation platform with a synchronous pulley rotating mechanism (1), and position angle rotation platform is provided with through hole (3), and through hole (3) is for installing the fixture being loaded with LED component; Position angle rotation platform has a boss (4), boss (4) is provided with the holding screw (2) of the axial location for adjusting fixture;
During test, the fixture being loaded with LED component is arranged on the through hole (3) of position angle rotation platform, adjusted the axial location of fixture by the holding screw (2) of adjustment boss (4), utilize synchronous pulley rotating mechanism (1) to realize the azimuthal 360 ° of rotations of LED component.
2. LED color vector measuring device according to claim 1, is characterized in that: boss (4) diameter is 30mm.
3. LED color vector measuring device according to claim 1 and 2, is characterized in that: through hole (3) has three and runs through boss (4), in 120 ° of arrangements; The threaded hole that through hole (3) is 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420717355.8U CN204286599U (en) | 2014-11-25 | 2014-11-25 | A kind of LED color vector measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420717355.8U CN204286599U (en) | 2014-11-25 | 2014-11-25 | A kind of LED color vector measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN204286599U true CN204286599U (en) | 2015-04-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420717355.8U Withdrawn - After Issue CN204286599U (en) | 2014-11-25 | 2014-11-25 | A kind of LED color vector measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390707A (en) * | 2014-11-25 | 2015-03-04 | 华南理工大学 | LED (light-emitting diode) color vector testing method and device |
| CN112304575A (en) * | 2020-10-10 | 2021-02-02 | 广州市雅江光电设备有限公司 | Automatic testing system and method for built-in color and color temperature of color lamp |
-
2014
- 2014-11-25 CN CN201420717355.8U patent/CN204286599U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390707A (en) * | 2014-11-25 | 2015-03-04 | 华南理工大学 | LED (light-emitting diode) color vector testing method and device |
| CN104390707B (en) * | 2014-11-25 | 2016-09-21 | 华南理工大学 | A kind of LED color vector method of testing and device |
| CN112304575A (en) * | 2020-10-10 | 2021-02-02 | 广州市雅江光电设备有限公司 | Automatic testing system and method for built-in color and color temperature of color lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20160921 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |