CN102980747A - Method and device for accelerated detection of lumen maintenance of lighting device - Google Patents
Method and device for accelerated detection of lumen maintenance of lighting device Download PDFInfo
- Publication number
- CN102980747A CN102980747A CN2012104924813A CN201210492481A CN102980747A CN 102980747 A CN102980747 A CN 102980747A CN 2012104924813 A CN2012104924813 A CN 2012104924813A CN 201210492481 A CN201210492481 A CN 201210492481A CN 102980747 A CN102980747 A CN 102980747A
- Authority
- CN
- China
- Prior art keywords
- lighting device
- lux maintenance
- default
- temperature
- luminous flux
- 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.)
- Granted
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a method and a device for accelerated detection of lumen maintenance of a lighting device. The method for accelerated detection of the lumen maintenance of the lighting device comprises the steps of determining a detection temperature, wherein the detection temperature is the environmental temperature at which the accelerated detection is conducted on the lighting device, and the detection temperature is higher than the normal temperature; adjusting the current environmental temperature to the detection temperature; and conducting accelerated detection on the lumen maintenance of the lighting device at the detection temperature. By the aid of the method and the device, the fact that the detection temperature is higher than the normal temperature is confirmed before the lumen maintenance of the lighting device is detected, so that the detection temperature guarantees that the detection period of the lighting device is shortened on the condition that a failure mechanism is not changed, and the life of the lighting device can be detected quickly.
Description
Technical field
The present invention relates to photoelectric field, in particular to a kind of acceleration detection method and device of lighting device lux maintenance.
Background technology
Lux maintenance is about a lighting device significant data in serviceable life, but the detection time to lux maintenance is longer, therefore need to carry out acceleration detection to these data, this accelerates the service time in life-span that the method for inspection is used for calculating the LED illuminating product, be whether lux maintenance satisfies the requirement of declaring the life-span (as using illuminating product 25000 or 30000 hours, its lux maintenance is more than 70%), the lux maintenance accelerated test method of conventional lamp and light source is, at room temperature light fixture and light source are lighted 6 continuously, 000 hour, such as lux maintenance more than 91.8% or 93.1%, then think the requirement (25000 or 30000 hours, its lux maintenance is more than 70%) of satisfying the life-span.This detection method is consuming time longer, approximately needs 9 months, can not satisfy the demand in industry and market.
For the acceleration detection of lux maintenance in the prior art oversize problem consuming time, effective solution is proposed not yet at present.
Summary of the invention
The invention provides a kind of acceleration detection method and device of lighting device lux maintenance, to solve at least the acceleration detection of lux maintenance oversize problem consuming time in the prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of acceleration detection method of lighting device lux maintenance.
Acceleration detection method according to lighting device lux maintenance of the present invention comprises: determine detected temperatures, wherein, described detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, and described detected temperatures is higher than normal temperature; Regulate current environmental temperature to described detected temperatures; And under described detected temperatures the lux maintenance of the described lighting device of acceleration detection.
Further, determine that detected temperatures comprises: obtain described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under the first default temperature at normal temperatures, wherein, described the first temperature is higher than described normal temperature; (D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under the second default temperature, wherein, described the second temperature is higher than described the first temperature; And (D0-D2)/D0 greater than 10% situation under, determine that described the first temperature is described detected temperatures.
Further, determine that described detected temperatures comprises: obtain described lighting device luminous flux D0 and the luminous flux D1 ' of described lighting device under 35 ℃ at normal temperatures; (D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of described lighting device under 45 ℃; (D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of described lighting device under 55 ℃; (D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of described lighting device under 65 ℃; And (D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining described lighting device is 55 ℃.
Further, determine that detected temperatures comprises: obtain described lighting device luminous flux D0 and the luminous flux D3 of described lighting device under the 3rd default temperature at normal temperatures, wherein, described the 3rd temperature is higher than described normal temperature, and described the 3rd temperature is greater than or equal to default ceiling temperature; (D0-D3)/D0 less than 10% situation under, determine that described ceiling temperature is described detected temperatures.
Further, determine that described detected temperatures comprises: obtain described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under 35 ℃ at normal temperatures "; (D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under 45 ℃ "; (D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of described lighting device under 55 ℃ "; (D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 of described lighting device under 65 ℃ "; And (D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining described lighting device is 65 ℃.
Further, after the lux maintenance of the described lighting device of acceleration detection, described method also comprises under described detected temperatures: the lux maintenance that obtains described lighting device; And the lux maintenance that obtains described lighting device is issued to the time of the first default lux maintenance in described detected temperatures.
Further, after described detected temperatures was issued to the time of the first default lux maintenance, described method also comprised at the lux maintenance that obtains described lighting device: the lux maintenance according to described lighting device determines that in the time that described detected temperatures is issued to the described first default lux maintenance the lux maintenance of described lighting device reaches the time of the described first default lux maintenance at normal temperatures; And determine that the lux maintenance of described lighting device reaches the time of the second default lux maintenance at normal temperatures according to the time that the lux maintenance of described lighting device reaches the described first default lux maintenance at normal temperatures, wherein, the described second default lux maintenance is less than the described first default lux maintenance.
Further, determine that in the time that described detected temperatures is issued to the described first default lux maintenance the time that the lux maintenance of described lighting device reaches the described first default lux maintenance at normal temperatures comprises according to the lux maintenance of described lighting device: determine that according to following formula described lighting device reaches the time of the described first default lux maintenance at normal temperatures:
Wherein, described t1 is described lighting device is issued to default lux maintenance in described detected temperatures time, t1 is 1680 hours, described t2 is the time that described lighting device reaches default lux maintenance at normal temperatures, described T1 is 55 ℃ of described detected temperatures, described T2 is 25 ℃ of normal temperature, and described Ea is activation energy, described K
BBe Boltzmann constant, the time that reaches at normal temperatures the described first default lux maintenance according to the lux maintenance of described lighting device determines that the time that the lux maintenance of described lighting device reaches the second default lux maintenance at normal temperatures comprises: determine that according to following formula described lighting device reaches the time of the described second default lux maintenance at normal temperatures:
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α-α(2-t3），
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of described lighting device reaches the described second default lux maintenance at normal temperatures, B=1.
To achieve these goals, according to another aspect of the present invention, provide a kind of acceleration detection device of lighting device lux maintenance, this device is used for carrying out the acceleration detection method of any one lighting device lux maintenance provided by the invention.
A kind of acceleration detection device of lighting device lux maintenance is provided according to a further aspect in the invention.The acceleration detection device of this lighting device lux maintenance comprises: the first determining unit, be used for to determine detected temperatures, and wherein, described detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, described detected temperatures is higher than normal temperature; Regulon is used for regulating current environmental temperature to described detected temperatures; And detecting unit, for the lux maintenance of the described lighting device of acceleration detection under described detected temperatures.
Further, described the first determining unit comprises: first obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under the first default temperature at normal temperatures, and wherein, described the first temperature is higher than described normal temperature; Second obtains subelement, be used for (D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under the second default temperature, wherein, described the second temperature is higher than described the first temperature; And first determine subelement, be used for (D0-D2)/D0 greater than 10% situation under, determine that described the first temperature is described detected temperatures.
Further, described the first determining unit comprises: the 3rd obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 ' of described lighting device under 35 ℃ at normal temperatures; The 4th obtains subelement, be used for (D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of described lighting device under 45 ℃; The 5th obtains subelement, be used for (D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of described lighting device under 55 ℃; The 6th obtains subelement, be used for (D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of described lighting device under 65 ℃; And second determine subelement, be used for (D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining described lighting device is 55 ℃.
Further, described the first determining unit also comprises: the 7th obtains subelement, be used for obtaining described lighting device luminous flux D0 and the luminous flux D3 of described lighting device under the 3rd default temperature at normal temperatures, wherein, described the 3rd temperature is higher than described normal temperature, and described the 3rd temperature is greater than or equal to default ceiling temperature; The 3rd determines subelement, be used for (D0-D3)/D0 less than 10% situation under, determine that described ceiling temperature is described detected temperatures.
Further, determine that described detected temperatures comprises: the 8th obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under 35 ℃ at normal temperatures "; The 9th obtains subelement, be used for (D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under 45 ℃ "; The tenth obtains subelement, be used for (D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of described lighting device under 55 ℃ "; The 11 obtains subelement, be used for (D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 ' ' of described lighting device under 65 ℃; And the 4th determine subelement, be used for (D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining described lighting device is 65 ℃.
Further, described device also comprises: the first acquiring unit, for the lux maintenance that obtains described lighting device; And second acquisition unit, be issued to for the first time of presetting lux maintenance for the lux maintenance that obtains described lighting device in described detected temperatures.
Further, described device also comprises: the second determining unit is used for determining that in the time that described detected temperatures is issued to the described first default lux maintenance the lux maintenance of described lighting device reaches the time of the described first default lux maintenance at normal temperatures according to the lux maintenance of described lighting device; And the 3rd determining unit, the time that reaches at normal temperatures the described first default lux maintenance for the lux maintenance according to described lighting device determines that the lux maintenance of described lighting device reaches the time of the second default lux maintenance at normal temperatures, wherein, the described second default lux maintenance is less than the described first default lux maintenance.
Further, described the second determining unit also is used for determining that according to following formula described lighting device reaches the time of the described first default lux maintenance at normal temperatures:
Wherein, described t1 is described lighting device is issued to default lux maintenance in described detected temperatures time, t1 is 1680 hours, described t2 is the time that described lighting device reaches default lux maintenance at normal temperatures, described T1 is 55 ℃ of described detected temperatures, described T2 is 25 ℃ of normal temperature, and described Ea is activation energy, described K
BBe Boltzmann constant, described the 3rd determining unit also is used for determining that according to following formula described lighting device reaches the time of the described second default lux maintenance at normal temperatures:
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α(t2-t3)，
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of described lighting device reaches the described second default lux maintenance at normal temperatures, B=1.
By the present invention, owing to before the lux maintenance that detects lighting device, determined to be higher than the detected temperatures of normal temperature, this detected temperatures has guaranteed in the constant situation of failure mechanism, shortened the sense cycle of lighting device, therefore solve the acceleration detection of lux maintenance oversize problem consuming time in the prior art, and then reached the effect in fast detecting lighting device life-span.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart according to the acceleration detection device of the embodiment of the invention;
Fig. 2 is the process flow diagram according to the acceleration detection method of the embodiment of the invention;
Fig. 3 is the reckoning synoptic diagram according to the acceleration detection of the embodiment of the invention.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The embodiment of the invention provides a kind of acceleration detection device, below acceleration detection device that the embodiment of the invention is provided be introduced.
Fig. 1 is the structured flowchart according to the acceleration detection device of the embodiment of the invention.
As shown in Figure 1, this acceleration detection device comprises the first determining unit 11, regulon 12 and detecting unit 13.
The first determining unit 11 is used for determining detected temperatures, and wherein, detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, and detected temperatures is higher than normal temperature.
May introduce some new errors when in the situation that improves temperature, carrying out acceleration detection, therefore, blindly improve detected temperatures and introduce new error and can cause the result of acceleration detection inaccurate, in the present embodiment, owing to pre-determine suitable detected temperatures, guarantee not have the introducing of new error, guaranteed the accuracy of acceleration detection.
Judge by the variation size of luminous flux whether detected temperatures is suitable in the present embodiment, the first determining unit can comprise that first obtains subelement, second and obtain subelement and first and determine subelement.Wherein, first obtains subelement is used for obtaining lighting device luminous flux D0 and the luminous flux D1 of lighting device under the first default temperature at normal temperatures, and wherein, the first temperature is higher than normal temperature; Second obtain subelement be used for (D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of lighting device under the second default temperature, wherein, the second temperature is higher than the first temperature; First determine subelement be used for (D0-D2)/D0 greater than 10% situation under, determine that the first temperature is detected temperatures.
As a kind of particularly implementation, the first determining unit can comprise that the 3rd obtains subelement, the 4th and obtain subelement, the 5th and obtain subelement, the 6th and obtain subelement and second and determine subelement.Wherein, the 3rd obtain subelement for obtaining lighting device luminous flux D0 and the luminous flux D1 ' of lighting device under 35 ℃ at normal temperatures; The 4th obtain subelement be used for (D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of lighting device under 45 ℃; The 5th obtain subelement be used for (D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of lighting device under 55 ℃; The 6th obtain subelement be used for (D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of lighting device under 65 ℃; Second determine subelement be used for (D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining lighting device is 55 ℃.
When detected temperatures is higher than a certain higher limit, can introduce new error, cause the result of acceleration detection inaccurate, therefore, even when temperature arrived higher limit, the decay of luminous flux was still little, with this higher limit temperature as detected temperatures, preferably, the first determining unit comprises that also the 7th obtains subelement and the 3rd definite subelement, and the 7th obtains subelement is used for obtaining lighting device luminous flux D0 and the luminous flux D3 of lighting device under the 3rd default temperature at normal temperatures.Wherein, the 3rd temperature is higher than normal temperature, and the 3rd temperature is greater than or equal to default ceiling temperature; The 3rd determine subelement be used for (D0-D3)/D0 less than 10% situation under, determine that ceiling temperature is detected temperatures.
As another kind of specific implementation, the first determining unit can comprise that the 8th obtains subelement, the 9th and obtain subelement, the tenth and obtain subelement, the 11 and obtain subelement and the 4th and determine subelement.Wherein, the 8th obtain subelement for obtaining lighting device luminous flux D0 and the luminous flux D1 of lighting device under 35 ℃ at normal temperatures "; The 9th obtain subelement be used for (D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of lighting device under 45 ℃ "; The tenth obtain subelement be used for (D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of lighting device under 55 ℃ "; The 11 obtain subelement be used for (D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 of lighting device under 65 ℃ "; The 4th determine subelement be used for (D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining lighting device is 65 ℃.
Detecting unit 13 is used for the lux maintenance of acceleration detection lighting device under detected temperatures.
Detecting unit 13 is recorded in the data in the testing process after the acceleration detection of the lux maintenance that starts illumination apparatus, detection time for example, luminous flux etc.
In the present embodiment, owing to before the lux maintenance that detects lighting device, determined to be higher than the detected temperatures of normal temperature, this detected temperatures has guaranteed in the constant situation of failure mechanism, shortened the sense cycle of lighting device, therefore solve the acceleration detection of lux maintenance oversize problem consuming time in the prior art, and then reached the effect in fast detecting lighting device life-span.
Judge whether a lighting device satisfies the requirement in life-span, need to detect lux maintenance and dropped to for 70% used time, when acceleration detection is tried, can drop to 96.5% used Time Calculation according to lux maintenance goes out lux maintenance and dropped to for 70% required time, therefore, in the present embodiment, need to get access to lux maintenance and drop to for 96.5% used time, and determine that according to this time lux maintenance dropped to for 70% required time, preferably, the acceleration detection device also comprises: the first acquiring unit, for the lux maintenance that obtains lighting device; And second acquisition unit, be issued to for the first time of presetting lux maintenance for the lux maintenance that obtains lighting device in detected temperatures.
Further, said apparatus also comprises: the second determining unit is used for determining that in the time that detected temperatures is issued to the first default lux maintenance the lux maintenance of lighting device reaches the time of the first default lux maintenance at normal temperatures according to the lux maintenance of lighting device; And the 3rd determining unit, the time that reaches at normal temperatures the first default lux maintenance for the lux maintenance according to lighting device determines that the lux maintenance of lighting device reaches the time of the second default lux maintenance at normal temperatures, wherein, the second default lux maintenance is less than the first default lux maintenance.In conjunction with concrete data, that is, drop to 96.5% used Time Calculation and go out lux maintenance and dropped to for 70% required time by obtaining lux maintenance.
Particularly, the second determining unit also is used for determining that according to following formula lighting device reaches the time of the first default lux maintenance at normal temperatures:
Wherein, t1 is that lighting device is issued to the time of presetting lux maintenance in detected temperatures, and t1 is 1680 hours, and t2 is the time that lighting device reaches default lux maintenance at normal temperatures, and T1 is 55 ℃ of detected temperatures, and T2 is 25 ℃ of normal temperature, and Ea is activation energy, K
BBe Boltzmann constant.
The 3rd determining unit also is used for determining that according to following formula lighting device reaches the time of the second default lux maintenance at normal temperatures:
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α(t2-t3)，
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of lighting device reaches the second default lux maintenance at normal temperatures, and B is fitting constant, be illustrated in the lux maintenance of original state lower lighting device, ideally B=1.
The embodiment of the invention also provides a kind of acceleration detection method, and the method can be carried out based on above-mentioned device.
The acceleration detection method to lux maintenance that present embodiment provides when improving detected temperatures, is not introduced new error, has shortened the time of acceleration detection, thereby determines the life-span under the regular service condition.
Lux maintenance can be tried to achieve by following formula:
Wherein, Φ
0Be initial luminous flux; The luminous flux that Φ records when being acceleration detection; α is attenuation coefficient; T is the time of lux maintenance test, and unit is hour (h).
Life termination calculates when decaying to 70% with lux maintenance, and the computing method of attenuation coefficient α are as follows:
Wherein, t
0Be the rated life time.The calculated example of (be lux maintenance when decaying to 70% used time) lux maintenance required value the when rated life time is 25000h is as follows:
Calculate attenuation coefficient α:
Calculate the required value of lux maintenance:
Namely be the LED illuminating product of 25000h for the rated life time, the required value of its lux maintenance in the time of 6000 hours is 91.8%.
Table 1 is that 25000 hours lighting device is at the lux maintenance of different time for the rated life time.
Table 1
| Time (h) | 25000 | 6000 |
| Lux maintenance | 0.7 | 0.918 |
| Temperature (℃) | 25 | 25 |
Table 2 is that 30000 hours lighting device is at the lux maintenance of different time for the rated life time.
Table 2
| Time (h) | 30000 | 6000 |
| Lux maintenance | 0.7 | 0.931 |
| Temperature (℃) | 25 | 25 |
In the used acceleration detection theory of present embodiment, known chemical reaction rate and temperature Relations Among, the experimental formula that Arrhenius sums up is as follows:
In the formula,
Be chemical reaction rate, K is Boltzmann constant, and Ea is the activation energy that causes inefficacy or degenerative process, and T is absolute temperature, and A0 is constant.
Utilize the arrhenius formula
Calculate attenuation coefficient, wherein A is constant; E
aBe activation energy; T
S, iBase-plate temp (that is, junction temperature) (unit is K) for light fixture or light source; k
BBe Boltzmann constant (0.8617 * 10-5eV/K).
Utilize the arrhenius model at the lower computational constant A of a base-plate temp (or junction temperature).
Fig. 2 is the process flow diagram according to the acceleration detection method of the embodiment of the invention.
As shown in Figure 2, this acceleration detection method comprises that following step S202 is to step S206.
Step S202 determines detected temperatures, and wherein, detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, and detected temperatures is higher than normal temperature.
Present embodiment accelerates the aging of lighting device with the rising environment temperature, and then reaches the purpose of accelerated aging test.May introduce which new error when in the situation that improves temperature, carrying out acceleration detection, therefore, blindly improve detected temperatures and introduce new error and can cause the result of acceleration detection inaccurate, in the present embodiment, owing to pre-determined suitable detected temperatures, guarantee not have the introducing of new error, thereby guaranteed the accuracy of acceleration detection.
In the present embodiment, judge by the variation size of luminous flux whether detected temperatures is suitable, at first, obtain lighting device luminous flux D0 and the lighting device luminous flux D1 that the employing integrating sphere measures under the first default temperature at normal temperatures, wherein, the first temperature is higher than normal temperature; Then, (D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of lighting device under the second default temperature, wherein, the second temperature is higher than the first temperature; At last, (D0-D2)/D0 greater than 10% situation under, determine that the first temperature is detected temperatures.That is, if under a certain temperature, luminous flux significantly reduces; detected temperatures when then determining above one-time detection is as detected temperatures, and generally speaking, the second temperature is higher 5 ℃ to 15 ℃ than the first temperature; preferred 10 ℃, in the present embodiment, the method is called the guard method of giving up the throne.
The below describes the method for determining detected temperatures with a kind of concrete implementation, comprises that step S1 is to step S5.
Step S1 obtains lighting device luminous flux D0 and the luminous flux D1 ' of lighting device under 35 ℃ at normal temperatures.
Step S2, (D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of lighting device under 45 ℃.
Step S3, (D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of lighting device under 55 ℃.
Step S4, (D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of lighting device under 65 ℃.
Step S5, (D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining lighting device is 55 ℃.
Detected temperatures is generally between 25 ℃ to 65 ℃.More than used temperature value all exemplary, carry out the requirement that above-mentioned steps still can satisfy present embodiment at other temperature values.
When detected temperatures is higher than a certain higher limit, can introduce new error, cause the result of acceleration detection inaccurate, therefore, when even temperature arrives higher limit, the decay of luminous flux is still little, with this higher limit temperature as detected temperatures, preferably, step S202 can obtain first lighting device luminous flux D0 and the luminous flux D3 of lighting device under the 3rd default temperature at normal temperatures, wherein, the 3rd temperature is higher than normal temperature, and the 3rd temperature is greater than or equal to default ceiling temperature; (D0-D3)/D0 less than 10% situation under, determine that ceiling temperature is detected temperatures.
Particularly, may further comprise the steps S1 ' to S5 ':
S1 ' obtains lighting device luminous flux D0 and the luminous flux D1 of lighting device under 35 ℃ at normal temperatures ".
S2 ', (D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of lighting device under 45 ℃ ".
S3 ', (D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of lighting device under 55 ℃ ".
S4 ', (D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 of lighting device under 65 ℃ ".
S5 ', (D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining lighting device is 65 ℃.
Consider the working environment, material behavior of LED etc., this accelerated method proposes the highest acceleration temperature and is no more than 65 ℃, and present embodiment uses 55 ℃ and accelerate, to reach the acceleration experiment of comparatively optimizing.Yet the kind amount of lighting device is various, for this acceleration detection method being popularized for widely application luminaire colony, present embodiment provides above-mentioned determination flow to judge for the optimal acceleration temperature of this product, in a specific implementation, can come as follows to determine detected temperatures, comprise the several steps of A to H:
A. take and choose at random two samples in the sample group, the state when mounting means should be with the design of its regulation or actual the use is identical.
B. get a sample and measure at normal temperatures luminous flux or brightness value, as the D0 value.
C. at first Temperature of Warm Case is got first default detected temperatures, for example 40 ℃, at least 20 minutes temperature stabilization time, reaches thermal equilibrium.In 15 minutes, finish the luminous flux or the illumination that measure this product, as the D1 value.
D. calculate (D0-D1)/D0, as less than 10%, the Temperature of Warm Case that then raises is to higher detected temperatures, for example 50 ℃.
E. measure luminous flux or illumination under this temperature by the method for step C, as the D2 value.
F. calculate (D0-D2)/D0, as less than 10%, the Temperature of Warm Case that then raises for example 50 ℃, as greater than 10%, is got the permission corresponding with 40 ℃ and is accelerated temperature value, for example 35 ℃ to higher detected temperatures.
G. measure luminous flux or illumination with the method for step C, as the D3 value.
H. calculate (D0-D3)/D0, as less than 10%, then continue the rising detected temperatures; As greater than 10%, as shown below, then get the permission of 50 ℃ of correspondences and accelerate temperature value, for example 45 ℃.
Table 3 is relation tables of above temperature.
Table 3
| Sequence | Acceleration judgement temperature (℃) | Permission acceleration temperature (℃) |
| 1 | 40 | 35 |
| 2 | 50 | 45 |
| 3 | 60 | 55 |
Above method can be summarized as, and measures the luminous flux of lighting device under different temperatures, as finding to exist larger rapid drawdown, for example, more than or equal to 10 ﹪, then need to carry out acceleration detection under the detected temperatures of this temperature being lower than; Take temperature corresponding to rapid drawdown point as judging temperature, allow to accelerate temperature (being detected temperatures) less than judging temperature, preferably, detected temperatures is set less than judging 5 degrees centigrade of temperature.
Because the method for this definite detected temperatures will limit the temperature that we accelerate.Therefore, we need to do corresponding adjustment, and method of adjustment is as shown in table 4:
Table 4
Step S204 regulates current environmental temperature to detected temperatures.
Generally speaking, photoelectric parameter is measured and should be carried out under 25 ℃ ± 1 ℃ condition of environment temperature.In this step, can come environment temperature is regulated by air conditioner or other type of heating.Simultaneously, present embodiment can guarantee that the air-flow around the lighting device is the normal convection air-flow that is caused by this product, does not allow vibration and the impact of illuminating product.Photoelectric parameter is measured and the maximum relative humidity of durability test is 65%.
The temperature of acceleration detection is the detected temperatures that above-mentioned steps is determined, generally is no more than 65% time at ambient humidity and lights continuously.Within the whole test period of lighting device, apply stable 220V alternating voltage burning-point.
The acceleration detection environment should guarantee that the air-flow around the lighting device is the normal convection air-flow that is caused by this device, that is to say that 55 ℃ of environment temperatures generally refer to ambient air temperature, is not the surface temperature of LED light fixture.
The burning-in period (pretreatment time) of test and the test node place of termination time should interrupt detecting, take out sample from the chamber of convection preventing wind, in the normal temperature and pressure environment, leave standstill, return to normal temperature, the testing photoelectronic parameter, get light flux values and calculate whether reach judgement, put aside that the parameters such as look floats cause the inefficacy of lighting device.
Unless particular provisions are arranged, the abort time is no more than 8 hours.The parameter measurement of duration of test should be chosen same surveying instrument as far as possible, chooses the same test condition guaranteeing the consistance of measurement result, and measurement result is record in addition, and should keep trackability.
Step S206, the lux maintenance of acceleration detection lighting device under detected temperatures.
In this step, can start lighting device and record data such as detection time, luminous flux and lux maintenance in the acceleration detection process.
For the lighting device of choosing in the present embodiment, satisfy sampling requirement:
Adopt identical material, components and parts and light source, the quantity-produced product forms inspection lot on the same production line.
Check sample is from the parent of same inspection lot, and plural at least manufacturing is randomly drawed in criticizing certainly.
For lighting device, require to randomly draw 3 samples the manufacturing batch more than (containing).For other indoor LED illumination products, require to randomly draw 12 samples the manufacturing batch more than (containing).
The electricity of lighting device and photometric property test voltage are rated voltage, the used power supply of product test should provide the sine-shaped voltage of 220V under the nominal operation frequency of 50Hz, be no more than 3% of base value with the summation that guarantees harmonic wave parts R MS value in the test process.During stabilization, supply voltage should be stabilized in ratings ± 0.5% scope; During measurement, supply voltage should be stabilized in ratings ± 0.2% scope in; The supply voltage of durability test should be stabilized in ± 2% in.
The test of the photoelectric parameter of lighting device is generally carried out under light fixture thermal equilibrium is stable, stabilization time is different and different with product, steady state (SS) is judged by the following method: 30min interior focusing output and electric power are carried out reading at least 3 times, reading with 15min calculates, and the deviation of light output and electric power should be not more than 0.5%.
Judge whether a lighting device satisfies the requirement in life-span, need to detect lux maintenance and dropped to for 70% used time, when acceleration detection is in the present embodiment tried, can drop to 96.5% used Time Calculation according to lux maintenance goes out lux maintenance and dropped to for 70% required time, therefore, in the present embodiment, need to get access to lux maintenance and drop to for 96.5% used time, and determine that according to this time lux maintenance dropped to for 70% required time, preferably, after step S206, can obtain the lux maintenance of lighting device, and the lux maintenance that obtains lighting device is issued to the time of the first default lux maintenance in detected temperatures.The default lux maintenance of in the present embodiment first is 96.5%, and is stricter owing to examination criteria with 96.5% as with reference to standard, further guaranteed the accuracy of acceleration detection.
Further, can determine that in the time that detected temperatures is issued to the first default lux maintenance the lux maintenance of lighting device reaches the time of the first default lux maintenance at normal temperatures according to the lux maintenance of lighting device; And determine that the lux maintenance of lighting device reaches the time of the second default lux maintenance at normal temperatures according to the time that the lux maintenance of lighting device reaches the first default lux maintenance at normal temperatures, wherein, the second default lux maintenance is less than the first default lux maintenance, and the default lux maintenance of second in the present embodiment is 70%.For example, drop to 96.5% used Time Calculation and go out lux maintenance and dropped to for 70% required time by obtaining lux maintenance.
Fig. 3 is the reckoning synoptic diagram according to the acceleration detection of the embodiment of the invention, as shown in Figure 3, in the situation that lux maintenance L=96.5% remains unchanged, is calculated the process of B point (25 ℃, 96.5%) by A point (55 ℃, 96.5%):
Particularly, determine that in the time that detected temperatures is issued to the first default lux maintenance the lux maintenance of lighting device reaches at normal temperatures the step of the time of the first default lux maintenance and can realize according to following formula according to the lux maintenance of lighting device:
Wherein, t1 is lighting device is issued to default lux maintenance in detected temperatures time, t1 is the used time of lux maintenance to 96.5% that A is ordered, it is 1680 hours, t2 is the time that lighting device reaches default lux maintenance at normal temperatures, and T1 is 55 ℃ of detected temperatures, and T2 is 25 ℃ of normal temperature, Ea is activation energy, K
BBe Boltzmann constant, can draw according to formula, the time t2=3000h that the lux maintenance to 96.5% that B is ordered is used.
The time that reaches at normal temperatures the first default lux maintenance according to the lux maintenance of lighting device determines that the lux maintenance of lighting device reaches the step of the time of the second default lux maintenance at normal temperatures, namely, from (25 ℃ of B points, 96.5%) can determine to realize according to following formula to C point (25 ℃, 70%):
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α(t2-t3)，
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of lighting device reaches the second default lux maintenance 70% at normal temperatures, and B is fitting constant, be illustrated in the lux maintenance of original state lower lighting device, ideally B=1.
Table 5 is that the different temperatures lower lighting device reaches the default required time of lux maintenance.
Table 5
| ? | C | B | A |
| Time (h) | 25000 | 3000 | 1680 |
| Lux maintenance | 0.7 | 0.965 | 0.965 |
| Temperature (℃) | 25 | 25 | 55 |
As can be seen from the above description, by the embodiment of the invention, can realize rapidly and accurately the acceleration detection of illumination apparatus.
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the process flow diagram of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the acceleration detection method of a lighting device lux maintenance is characterized in that, comprising:
Determine detected temperatures, wherein, described detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, and described detected temperatures is higher than normal temperature;
Regulate current environmental temperature to described detected temperatures; And
The lux maintenance of the described lighting device of acceleration detection under described detected temperatures.
2. acceleration detection method according to claim 1 is characterized in that, determines that detected temperatures comprises:
Obtain described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under the first default temperature at normal temperatures, wherein, described the first temperature is higher than described normal temperature;
(D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under the second default temperature, wherein, described the second temperature is higher than described the first temperature; And
(D0-D2)/D0 greater than 10% situation under, determine that described the first temperature is described detected temperatures.
3. acceleration detection method according to claim 2 is characterized in that, determines that described detected temperatures comprises:
Obtain described lighting device luminous flux D0 and the luminous flux D1 ' of described lighting device under 35 ℃ at normal temperatures;
(D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of described lighting device under 45 ℃;
(D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of described lighting device under 55 ℃;
(D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of described lighting device under 65 ℃; And
(D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining described lighting device is 55 ℃.
4. acceleration detection method according to claim 1 is characterized in that, determines that detected temperatures comprises:
Obtain described lighting device luminous flux D0 and the luminous flux D3 of described lighting device under the 3rd default temperature at normal temperatures, wherein, described the 3rd temperature is higher than described normal temperature, and described the 3rd temperature is greater than or equal to default ceiling temperature;
(D0-D3)/D0 less than 10% situation under, determine that described ceiling temperature is described detected temperatures.
5. acceleration detection method according to claim 4 is characterized in that, determines that described detected temperatures comprises:
Obtain described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under 35 ℃ at normal temperatures ";
(D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under 45 ℃ ";
(D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of described lighting device under 55 ℃ ";
(D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 of described lighting device under 65 ℃ "; And
(D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining described lighting device is 65 ℃.
6. acceleration detection method according to claim 1 is characterized in that, after the lux maintenance of the described lighting device of acceleration detection, described method also comprises under described detected temperatures:
Obtain the lux maintenance of described lighting device; And
The lux maintenance that obtains described lighting device is issued to the time of the first default lux maintenance in described detected temperatures.
7. acceleration detection method according to claim 6 is characterized in that, after described detected temperatures was issued to the time of the first default lux maintenance, described method also comprised at the lux maintenance that obtains described lighting device:
Lux maintenance according to described lighting device determines that in the time that described detected temperatures is issued to the described first default lux maintenance the lux maintenance of described lighting device reaches the time of the described first default lux maintenance at normal temperatures; And
The time that reaches at normal temperatures the described first default lux maintenance according to the lux maintenance of described lighting device determines that the lux maintenance of described lighting device reaches the time of the second default lux maintenance at normal temperatures, wherein, the described second default lux maintenance is less than the described first default lux maintenance.
8. acceleration detection method according to claim 7 is characterized in that,
Determine that in the time that described detected temperatures is issued to the described first default lux maintenance the time that the lux maintenance of described lighting device reaches the described first default lux maintenance at normal temperatures comprises according to the lux maintenance of described lighting device:
Determine that according to following formula described lighting device reaches the time of the described first default lux maintenance at normal temperatures:
Wherein, described t1 is described lighting device is issued to default lux maintenance in described detected temperatures time, t1 is 1680 hours, described t2 is the time that described lighting device reaches default lux maintenance at normal temperatures, described T1 is 55 ℃ of described detected temperatures, described T2 is 25 ℃ of normal temperature, and described Ea is activation energy, described K
BBe Boltzmann constant,
The time that reaches at normal temperatures the described first default lux maintenance according to the lux maintenance of described lighting device determines that the time that the lux maintenance of described lighting device reaches the second default lux maintenance at normal temperatures comprises:
Determine that according to following formula described lighting device reaches the time of the described second default lux maintenance at normal temperatures:
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α(t2-t3），
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of described lighting device reaches the described second default lux maintenance at normal temperatures, B=1.
9. the acceleration detection device of a lighting device lux maintenance is characterized in that, comprising:
The first determining unit be used for to be determined detected temperatures, and wherein, described detected temperatures is the environment temperature of illumination apparatus when carrying out acceleration detection, and described detected temperatures is higher than normal temperature;
Regulon is used for regulating current environmental temperature to described detected temperatures; And
Detecting unit is for the lux maintenance of the described lighting device of acceleration detection under described detected temperatures.
10. acceleration detection device according to claim 9 is characterized in that, described the first determining unit comprises:
First obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under the first default temperature at normal temperatures, and wherein, described the first temperature is higher than described normal temperature;
Second obtains subelement, be used for (D0-D1)/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under the second default temperature, wherein, described the second temperature is higher than described the first temperature; And
First determines subelement, be used for (D0-D2)/D0 greater than 10% situation under, determine that described the first temperature is described detected temperatures.
11. acceleration detection device according to claim 10 is characterized in that, described the first determining unit comprises: the 3rd obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 ' of described lighting device under 35 ℃ at normal temperatures;
The 4th obtains subelement, be used for (D0-D1 ')/D0 less than 10% situation under, obtain the luminous flux D2 ' of described lighting device under 45 ℃;
The 5th obtains subelement, be used for (D0-D2 ')/D0 less than 10% situation under, obtain the luminous flux D3 ' of described lighting device under 55 ℃;
The 6th obtains subelement, be used for (D0-D3 ')/D0 less than 10% situation under, obtain the luminous flux D4 ' of described lighting device under 65 ℃; And
Second determines subelement, be used for (D0-D4 ')/D0 greater than 10% situation under, the detected temperatures of determining described lighting device is 55 ℃.
12. acceleration detection device according to claim 9 is characterized in that, described the first determining unit also comprises:
The 7th obtains subelement, be used for obtaining described lighting device luminous flux D0 and the luminous flux D3 of described lighting device under the 3rd default temperature at normal temperatures, wherein, described the 3rd temperature is higher than described normal temperature, and described the 3rd temperature is greater than or equal to default ceiling temperature;
The 3rd determines subelement, be used for (D0-D3)/D0 less than 10% situation under, determine that described ceiling temperature is described detected temperatures.
13. acceleration detection device according to claim 12 is characterized in that, determines that described detected temperatures comprises:
The 8th obtains subelement, is used for obtaining described lighting device luminous flux D0 and the luminous flux D1 of described lighting device under 35 ℃ at normal temperatures ";
The 9th obtains subelement, be used for (D0-D1 ")/D0 less than 10% situation under, obtain the luminous flux D2 of described lighting device under 45 ℃ ";
The tenth obtains subelement, be used for (D0-D2 ")/D0 less than 10% situation under, obtain the luminous flux D3 of described lighting device under 55 ℃ ";
The 11 obtains subelement, be used for (D0-D3 ")/D0 less than 10% situation under, obtain the luminous flux D4 of described lighting device under 65 ℃ "; And
The 4th determines subelement, be used for (D0-D4 ")/D0 less than 10% situation under, the detected temperatures of determining described lighting device is 65 ℃.
14. acceleration detection device according to claim 9 is characterized in that, described device also comprises:
The first acquiring unit is for the lux maintenance that obtains described lighting device; And
Second acquisition unit was issued to for the first time of presetting lux maintenance for the lux maintenance that obtains described lighting device in described detected temperatures.
15. acceleration detection device according to claim 14 is characterized in that, described device also comprises:
The second determining unit is used for determining that in the time that described detected temperatures is issued to the described first default lux maintenance the lux maintenance of described lighting device reaches the time of the described first default lux maintenance at normal temperatures according to the lux maintenance of described lighting device; And
The 3rd determining unit, the time that reaches at normal temperatures the described first default lux maintenance for the lux maintenance according to described lighting device determines that the lux maintenance of described lighting device reaches the time of the second default lux maintenance at normal temperatures, wherein, the described second default lux maintenance is less than the described first default lux maintenance.
16. acceleration detection device according to claim 15 is characterized in that,
Described the second determining unit also is used for determining that according to following formula described lighting device reaches the time of the described first default lux maintenance at normal temperatures:
Wherein, described t1 is described lighting device is issued to default lux maintenance in described detected temperatures time, t1 is 1680 hours, described t2 is the time that described lighting device reaches default lux maintenance at normal temperatures, described T1 is 55 ℃ of described detected temperatures, described T2 is 25 ℃ of normal temperature, and described Ea is activation energy, described K
BBe Boltzmann constant,
Described the 3rd determining unit also is used for determining that according to following formula described lighting device reaches the time of the described second default lux maintenance at normal temperatures:
φ（t）=Be
-αt，
φ（t2）/φ（t3）=e
-α(t2-t3），
Wherein, φ (t2)=0.965, φ (t3)=0.7, t2=3000, t3 are the time that the lux maintenance of described lighting device reaches the described second default lux maintenance at normal temperatures, B=1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210492481.3A CN102980747B (en) | 2012-11-27 | 2012-11-27 | Method and device for accelerated detection of lumen maintenance of lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210492481.3A CN102980747B (en) | 2012-11-27 | 2012-11-27 | Method and device for accelerated detection of lumen maintenance of lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102980747A true CN102980747A (en) | 2013-03-20 |
| CN102980747B CN102980747B (en) | 2015-07-01 |
Family
ID=47854970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210492481.3A Active CN102980747B (en) | 2012-11-27 | 2012-11-27 | Method and device for accelerated detection of lumen maintenance of lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102980747B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502063A (en) * | 2014-11-03 | 2015-04-08 | 浙江中博光电科技有限公司 | LED light source high temperature long term luminous flux maintenance rate detection method |
| CN107290642A (en) * | 2017-07-28 | 2017-10-24 | 华南理工大学 | LED light product-derived electrical characteristic parameter multistation multi-parameter comprehensive concurrent testing method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2138058C1 (en) * | 1997-11-25 | 1999-09-20 | Государственный научный центр РФ Государственное предприятие Научно-производственное объединение "Орион" | Process testing semiconductor photodetectors |
| CN101788652A (en) * | 2010-02-02 | 2010-07-28 | 中国计量学院 | Electronic energy-saving lamp service life rapid detection method |
| CN102608509A (en) * | 2011-12-22 | 2012-07-25 | 中国科学院半导体研究所 | System and method for carrying out light/electrical/thermal ageing comprehensive testing on light-emitting diodes |
| GB2488569A (en) * | 2011-03-02 | 2012-09-05 | Feasa Entpr Ltd | Testing light emitting diode light sources in a climate controlled chamber |
| CN102707212A (en) * | 2011-10-28 | 2012-10-03 | 杭州浙大三色仪器有限公司 | Device for detecting service life of light emitting diode (LED) in real time |
| CN102721934A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | Accelerated detection method for service life of driving power supply |
-
2012
- 2012-11-27 CN CN201210492481.3A patent/CN102980747B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2138058C1 (en) * | 1997-11-25 | 1999-09-20 | Государственный научный центр РФ Государственное предприятие Научно-производственное объединение "Орион" | Process testing semiconductor photodetectors |
| CN101788652A (en) * | 2010-02-02 | 2010-07-28 | 中国计量学院 | Electronic energy-saving lamp service life rapid detection method |
| GB2488569A (en) * | 2011-03-02 | 2012-09-05 | Feasa Entpr Ltd | Testing light emitting diode light sources in a climate controlled chamber |
| CN102721934A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | Accelerated detection method for service life of driving power supply |
| CN102707212A (en) * | 2011-10-28 | 2012-10-03 | 杭州浙大三色仪器有限公司 | Device for detecting service life of light emitting diode (LED) in real time |
| CN102608509A (en) * | 2011-12-22 | 2012-07-25 | 中国科学院半导体研究所 | System and method for carrying out light/electrical/thermal ageing comprehensive testing on light-emitting diodes |
Non-Patent Citations (2)
| Title |
|---|
| 闫德立等: "高亮发光二极管寿命评价", 《半导体技术》 * |
| 黄杰等: "加速寿命试验评估功率发光二极管平均寿命", 《半导体光电》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502063A (en) * | 2014-11-03 | 2015-04-08 | 浙江中博光电科技有限公司 | LED light source high temperature long term luminous flux maintenance rate detection method |
| CN104502063B (en) * | 2014-11-03 | 2017-02-15 | 浙江中博光电科技有限公司 | LED light source high temperature long term luminous flux maintenance rate detection method |
| CN107290642A (en) * | 2017-07-28 | 2017-10-24 | 华南理工大学 | LED light product-derived electrical characteristic parameter multistation multi-parameter comprehensive concurrent testing method and device |
| CN107290642B (en) * | 2017-07-28 | 2019-09-06 | 华南理工大学 | LED light product-derived electrical characteristic parameter multistation multi-parameter comprehensive concurrent testing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102980747B (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105759223B (en) | Detection method for maintaining service life of luminous flux of L ED lamp | |
| EP3506495A1 (en) | Method and system for testing weather resistance of photovoltaic module | |
| EP2495575B1 (en) | Testing LED light sources | |
| JP2010078607A (en) | Optical filter for manipulating spectral power distribution in accelerated weathering device | |
| Wu et al. | A gamma process-based prognostics method for CCT shift of high-power white LEDs | |
| CN102980747A (en) | Method and device for accelerated detection of lumen maintenance of lighting device | |
| Liu et al. | Low-energy LED lighting heat gain distribution in buildings, part II: LED luminaire selection and test results | |
| Narendran et al. | Long-term performance of white LEDs and systems | |
| CN206851073U (en) | The LED irradiation systems and LED of temperature stabilization | |
| Osterwald et al. | On the reliability of photovoltaic short-circuit current temperature coefficient measurements | |
| ATE533338T1 (en) | TYPE IDENTIFICATION OF A GAS DISCHARGE LAMP TO BE OPERATED WITH AN ELECTRONIC BALLAST | |
| CN108900740B (en) | Camera device for measuring environment temperature and humidity | |
| Guisso et al. | An extended design methodology for LED lighting systems including lifetime estimation | |
| CN103837572A (en) | Testing method and testing system of plastic shell with metal insert | |
| CN105785282B (en) | Detection method for alleged service life of L ED lamp | |
| Gerloff et al. | Luminous intensity comparison based on new standard lamps with LED reference spectrum | |
| CN104502063B (en) | LED light source high temperature long term luminous flux maintenance rate detection method | |
| Hegedüs et al. | Reliability issues of mid-power LEDs | |
| CN103743544B (en) | A kind of LED module and the hot matching detection method of light fixture and assembly method thereof | |
| Lu et al. | Correlation of activation energy between LEDs and luminaires in the lumen depreciation test | |
| Khokhlov et al. | Test procedure for determining the stabilisation time of lamps and other household appliances | |
| CN105842634A (en) | Method for detecting luminance attenuation of LED lamp | |
| CN216927044U (en) | Energy-saving lamp life detection device | |
| Petroski | Range and probabilities of LED junction temperature predictions based upon forward voltage population statistics | |
| Zhang et al. | Development of a real-time monitoring system with uni-photodetector for LED long term reliability tests |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Shaowei Inventor after: Fan Xuejun Inventor after: Wang Zhiying Inventor after: Sun Bo Inventor after: Yuan Changan Inventor after: Zhang Guoqi Inventor before: Xu Shaowei Inventor before: Fan Xuejun Inventor before: Wang Zhiying Inventor before: Sun Bo Inventor before: Yuan Changan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU SHAOWEI FAN XUEJUN WANG ZHIYING SUN BO YUAN CHANGAN TO: XU SHAOWEI FAN XUEJUN WANG ZHIYING SUN BO YUAN CHANGAN ZHANG GUOQI |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |