CN201600237U - Light source test device - Google Patents
Light source test device Download PDFInfo
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- CN201600237U CN201600237U CN2009202005165U CN200920200516U CN201600237U CN 201600237 U CN201600237 U CN 201600237U CN 2009202005165 U CN2009202005165 U CN 2009202005165U CN 200920200516 U CN200920200516 U CN 200920200516U CN 201600237 U CN201600237 U CN 201600237U
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- light
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Abstract
The utility model discloses a light source test device, which comprises a test chamber. Two or more than two tested light sources are disposed inside the test chamber, the tested light sources are electrically connected with a program controlled power source, a sampling device capable of receiving every light emitted from the tested light sources is disposed inside the test chamber, the sampling device is connected with a measuring meter, and the measuring meter and the power source are disposed outside of the test chamber and electrically connected with an upper computer. The measuring meter is in linkage with the program controlled power source through program control, the tested light sources and the measuring meter can work under certain time sequence, thereby measurement of optical parameters of a plurality of light sources can be realized by using one light measuring and sampling device at least, and under the condition without affecting precision, the measurement cost is greatly reduced, and operation is simple and convenient.
Description
[technical field]
The utility model belongs to the test unit field, is specially a kind of light source test unit.
[background technology]
Life-span and temperature characterisitic are to characterize the crucial index of light source reliability, particularly for the such new light sources of LED.With the LED product is example, and at present general is to reach for 50% or 70% initial luminous flux time as its life time with the LED product, therefore in durability test, also needs to monitor the relative variation of its luminous flux in ageing LED product; In order to shorten test period, also adopt the accelerated aging method sometimes, promptly improve the environment temperature at light source place or increase current/voltage.The photochromic electrical property of light sources such as LED is very big with Temperature Influence, so the high cold tolerance of light source, high ambient temperature etc. all are the indexs that needs test.The measurement of these performances and index can realize in the chamber with optical measurement function, present scheme generally has two kinds, the one, in a test cavity, only test a light source, the measurement cost of this method is higher, especially when measuring the less light source of some volumes, can waste huge space and other resource (as the temperature in the test cavity is elevated to a certain degree energy needed); Another kind method is a plurality of light sources of test in a test cavity, the photometry harvester of a plurality of band cones is set along the optical axis direction of each light source simultaneously, cone is in order to isolate the light that other light source sends, each photometry harvester all is equipped with a measurement instrument, measure the optical parametric of corresponding measured light, this method need be provided with a plurality of photometry harvesters and measurement instrument, and it is also higher that it measures cost.
[utility model content]
The utility model is intended to solve above-mentioned defective of the prior art, provides cost lower but life-span and temperature characterisitic test method and device thereof that measuring accuracy is higher.
The utility model is achieved through the following technical solutions: a kind of light source test unit, it is characterized in that comprising test cavity, two or more measured lights are set in the test cavity, measured light is electrically connected with program-controlled power supply, be provided with in the test cavity and can receive from the radiative sampler of each measured light, sampler is connected with measurement instrument, and measurement instrument and power supply place outside the test cavity, and measurement instrument and power supply are electrically connected with host computer.
Test cavity provides an experimental enviroment that parasitic light is very low for the ageing durability test and the temperature characterisitic test of light source, and as a rule, the Controllable Temperature in the test cavity.Above-mentioned measurement instrument all is connected with host computer with power supply, realizes robotization control and record, and is simple to operation.Light source is in process of the test, it is directly proportional with its luminous flux in the illumination that certain position produces, change general also consistent with the variation of the average color of light source in the colourity of this position, therefore by making measurement instrument and program-controlled power supply by program control interlock, measured light and measurement instrument are all according to certain time sequence work, sampler of minimum like this use and measurement instrument just can two or more measured lights of sampling and measuring in certain test period, in certain external condition such as temperature, optical parametric under the current/voltage, and can calculate the relative variation of optical parametric, as lux maintenance, color drift etc., under the prerequisite that does not influence measuring accuracy, significantly reduced the measurement cost.
Light source test unit of the present utility model can also further limit by the following technical programs:
Above-mentioned photo measure sampler is the sampling by optical fiber device, and described measurement instrument is a photometer or/and spectral radiometer, and the sampling by optical fiber device is given measurement instrument by optical fiber with the optical signal transmission of gathering.Perhaps, above-mentioned sampler is a luminosity probe, the photometer of described measurement instrument for matching with luminosity probe.
Above-mentioned test cavity is the test cavity with temperature control function, and the environment temperature probe of environment temperature in the monitoring chamber is set in test cavity, and heating-cooling device is set in test cavity or outside the test cavity.In the technical program, can realize the high low temperature circulation tolerance of light source, the highest permission environment temperature and the measurement in accelerated life test equitemperature characteristic and life-span of light source by monitoring to environment temperature.
Above-mentioned each measured light or with the contacted anchor clamps of light source on the light-source temperature measuring sonde that one or more monitor light source self temperature is set, relatively and the monitoring of environment temperature, the monitoring of measured light self temperature is more directly perceived.
A power supply is only arranged in the above-mentioned light source test unit, and this power supply provides the power supply of certain sequential for all light sources; Perhaps in the light source test unit many power supplies are arranged, every power supply is one or more light source power supplies.
The beneficial effects of the utility model are only to need a photo measure sampler, and by the light source works set with measure the measurement that sequential just can realize a plurality of light source light mathematic(al) parameters, under the prerequisite that does not influence precision, the measurement cost significantly reduces, and simple to operation.
[description of drawings]
Accompanying drawing 1: the structural representation of light source test unit embodiment 1 of the present utility model;
Accompanying drawing 2: the sequential chart of a kind of light source ageing of the present utility model and measurement;
Accompanying drawing 3: the structural representation of light source aging test device embodiment 2 of the present utility model;
Accompanying drawing 4: another kind of light source ageing of the present utility model and measurement sequential chart.
[embodiment]
Embodiment 1:
Be illustrated in figure 1 as a kind of light source test unit structural representation of the present utility model.Comprise a test cavity 1 that parasitic light is lower, in the test cavity 1 a plurality of measured lights 2 can be set, the below ageing of test cavity 1 in the present embodiment 1# to 6# totally 6 high-power packaged LEDs 2, these LED 2 are installed on the more anchor clamps 10 in merit position, and their light-emitting area is upwards.All LED 2 are electrically connected with same program-controlled power supply 3, and this power supply 3 can be the power supply that LED multi-path provides forward current, frequency and EDM Generator of Adjustable Duty Ratio.Top in the chamber is provided with photo measure sampling by optical fiber device 4, and sampling by optical fiber device 4 belows are provided with the light barrier 14 that stops the measured light direct light.Sampling by optical fiber device 4 links to each other with photometer 5 by conduction optical fiber 6, and above-mentioned photometer 5 and power supply 3 place outside the test cavity.Test cavity 1 has temperature monitoring and control function, as shown in Figure 1, is provided with environment temperature probe 7 in the test cavity, also is provided with heating and cooling device 8 in the test cavity outside, and this environment temperature probe 7 and heating and cooling device 8 are electrically connected with test control module 9; On the anchor clamps 10 of this external each LED substrate below light-source temperature measuring sonde 11 is set, light-source temperature measuring sonde 11 is connected with multi way temperature meter 13, multi way temperature meter 13 is electrically connected with host computer 12, above-mentioned power supply 3, photometer 5, test cavity control module 9 all are connected with host computer, realize that control automatically and result show.
Be illustrated in figure 2 as 6 LED, 2 work of LED aging test and the sequential chart of photometer 5 samplings.These LED 2 light one by one and extinguish, and when each LED lighted, other LED was in and extinguishes state.Photometer 5 is measured illumination that its produces in light sampler 4 positions when each LED lights, as at T shown in Figure 2
1In cycle, photometer 5 is at t
1Constantly measure the illumination that 1#LED produces, at t
2Constantly measure the illumination that 2#LED produces, by that analogy.At some ageings in the cycle, at t
1The illumination that 1#LED produces in time should be worth and above-mentioned T
1T in cycle
1The ratio of the brightness value that constantly records is represented with percentage, this value be 1#LED under this burning-in period lux maintenance; In like manner, measure t
2The brightness value of time and in above-mentioned T
1T in cycle
2The brightness value that constantly records is compared, and obtains the lux maintenance of 2#LED at this burning-in period, obtains the lux maintenance of each LED 2 at a certain burning-in period by that analogy.
In measurement, if the temperature in the test cavity remains the rated temperature (being generally room temperature) of LED 2 work, what then said process was measured is the lux maintenance of LED 2 under the normal temperature; If experiment has higher temperature in the chamber, then said process is realized LED
2 accelerated aging test.
The temperature of test cavity is carried out other control,, treat after a certain design temperature is issued to thermal equilibrium, to light one by one and extinguish measured light, record the optical parametric of each measured light under this temperature as the environment temperature in the test cavity that progressively raises; Environment temperature in the test cavity is alternately raise or reduction, and after reaching the thermal equilibrium certain hour, measure the light quantity of 6 LED 2, obtain the relevant temperature characteristic of LED 2.
Embodiment 2:
As shown in Figure 3, be another kind of light source aging test apparatus structure synoptic diagram of the present utility model.Comprise a test cavity 1 that parasitic light is very low, below test cavity 1 ageing 4 LED modules 2 that light-emitting area makes progress, these LED modules 2 all respectively have a program-controlled power supply 3 to its independent power supply, and the output voltage of each power supply 3, switching frequency and dutycycle are all adjustable.Top in the test cavity 1 is provided with sampling by optical fiber device 4, and sampling by optical fiber device 4 belows are provided with light barrier 14, and sampling by optical fiber device 4 can receive light from each LED module 2 by diffusing globe 14.Sampling by optical fiber device 4 links to each other with test cavity 1 spectral radiometer 5 outward by conduction optical fiber 6.Test cavity 1 has temperature monitoring and control function, as shown in Figure 3, is provided with environment temperature probe 7 in the test cavity, the peripheral parcel of test cavity heating and cooling device 8, and this environment temperature probe 7 and heating and cooling device 8 are electrically connected with test cavity control module 9; All be provided with light-source temperature measuring sonde 11 on the shell of this external each LED module 2, light-source temperature measuring sonde 11 is connected with multi way temperature meter 13, above-mentioned power supply 3, photometer 5, test cavity control module 9 and multi way temperature meter 13 all are connected with host computer, realize that control automatically and result show.
Be illustrated in figure 4 as the sequential chart of ageing and these 4 LED modules 2 of measurement.4 LED modules 2 are with identical frequency and cycling, but have certain phase differential, light in the cycle of extinguishing at each, and it is longer relatively that the LED module is in time of illuminating state.The phase differential of each LED module 2 work satisfies: the measured light of lighting extinguishes successively, and last light source is when extinguishing, and other light source still is in the state that extinguishes with one-period.In each cycle, when spectral radiometer soon extinguishes at each LED module 2, i.e. t among Fig. 4
1, t
2, t
3, t
4Sampling and measuring obtains absolute spectral radiant power P constantly
1(λ), P
2(λ), P
3(λ), P
4(λ), then can be expressed as P in the spectral radiant power of this burning-in period 1# light source
1(λ)-P
2(λ), the spectral radiant power of 2# light source can be expressed P
2(λ)-P
3(λ), the spectral radiant power of 3# light source can be expressed P
3(λ)-P
4(λ), the spectral radiant power of 4# light source is P
4(λ).Calculate illumination and the color of each light source according to the CIE formula at sampling by optical fiber device 4 places.The illumination and the color of each the measured LED module in each cycle are with first period T
1Interior respective value is compared, and obtains lux maintenance and the color drift of each LED module at different time.
Identical with embodiment 1, present embodiment also can be used for measuring the temperature characterisitic of LED module.
Claims (4)
1. light source test unit, it is characterized in that comprising test cavity (1), two or more measured lights (2) are set in the test cavity (1), measured light (2) is electrically connected with program-controlled power supply (3), be provided with in the test cavity (1) and can receive from the radiative sampler of each measured light (2) (4), sampler (4) is connected with measurement instrument (5), measurement instrument (5) and power supply (1) place outside the test cavity (1), and measurement instrument (5) and power supply (1) are electrically connected with host computer (12).
2. light source test unit according to claim 1 is characterized in that the sampling by optical fiber device (4) of described sampler (4) for linking to each other with optical fiber (6), and described measurement instrument (5) is that photometer is or/and spectral radiometer.
3. light source test unit according to claim 1 is characterized in that described sampler (4) is a luminosity probe, the photometer of described measurement instrument (5) for matching with luminosity probe.
4. light source test unit according to claim 1, it is characterized in that described test cavity (1) is the test cavity with temperature control function, the environment temperature that environment temperature in the monitoring chamber is set in test cavity (1) is popped one's head in (7), each measured light (2) or with the contacted anchor clamps of measured light (2) on one or more light-source temperature measuring sondes (11) are set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202005165U CN201600237U (en) | 2009-11-19 | 2009-11-19 | Light source test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202005165U CN201600237U (en) | 2009-11-19 | 2009-11-19 | Light source test device |
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| Publication Number | Publication Date |
|---|---|
| CN201600237U true CN201600237U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202005165U Expired - Lifetime CN201600237U (en) | 2009-11-19 | 2009-11-19 | Light source test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507007A (en) * | 2011-11-08 | 2012-06-20 | 杭州中为光电技术股份有限公司 | Method for performing spectrum colour measurement for LED (light-emitting diode) by optical fibre conduction |
| CN103185870A (en) * | 2012-01-02 | 2013-07-03 | 隆达电子股份有限公司 | Lighting test equipment for recovering light energy |
| CN103411679A (en) * | 2013-08-16 | 2013-11-27 | 欧灵珍 | Chrominance optical detection system and chrominance optical detection method |
| CN110779621A (en) * | 2019-10-17 | 2020-02-11 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic testing device and method for brightness sensor for head-up display |
-
2009
- 2009-11-19 CN CN2009202005165U patent/CN201600237U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507007A (en) * | 2011-11-08 | 2012-06-20 | 杭州中为光电技术股份有限公司 | Method for performing spectrum colour measurement for LED (light-emitting diode) by optical fibre conduction |
| CN103185870A (en) * | 2012-01-02 | 2013-07-03 | 隆达电子股份有限公司 | Lighting test equipment for recovering light energy |
| CN103411679A (en) * | 2013-08-16 | 2013-11-27 | 欧灵珍 | Chrominance optical detection system and chrominance optical detection method |
| CN110779621A (en) * | 2019-10-17 | 2020-02-11 | 中国航空工业集团公司洛阳电光设备研究所 | Automatic testing device and method for brightness sensor for head-up display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU EVERFINE OPTOELECTRONIC INFORMATION CO., Free format text: FORMER NAME: HANGZHOU EVERFINE PHOTO-E-INFO CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 310053 Binjiang District, Zhejiang Province, Hangzhou Road, No. 669 Patentee after: Hangzhou Everfine Photo-E-Info Co., Ltd. Address before: 310053 Binjiang District, Zhejiang Province, Hangzhou Road, No. 669 Patentee before: Hangzhou Everfine Photo-E-Info Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101006 |
|
| CX01 | Expiry of patent term |