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LED product lifespan testing

LED Lifetime Test is an important verification procedure for assessing the changes in optical characteristics and reliability of light-emitting diodes under long-term operation. As LED technology and applications become increasingly mature, the demands for quality and lifespan in various fields, from automotive lighting, display panels, smart lighting to outdoor optoelectronic devices, have become more stringent. Due to continuous advancements in processes and materials, the industry commonly adopts AEC-Q101 automotive reliability standards as the main basis to ensure that products maintain stable performance under different environments and operating conditions. Unlike general electronic components that use voltage as a control factor, LEDs operate using current control and are very sensitive to electrostatic discharge (ESD) and thermal management design. Poor heat dissipation can lead to an increase in junction temperature (Tj), which accelerates light degradation and shortens lifespan. Therefore, the core purpose of LED lifetime testing is to simulate multiple stress conditions in actual usage scenarios to verify their reliability and service life.

LED lifespan and reliability testing items

MA-tek offers comprehensive reliability testing for LED components and modules, including:

Electrostatic Discharge (ESD) TestingVerify the product's tolerance to electrostatic discharge using HBM and CDM models.
Moisture Sensitivity Level Testing (MSL)Evaluate the moisture resistance performance of SMD packages under the reflow soldering process.
Thermal resistance (Θth) and junction temperature estimation (Tj)Assist customers in analyzing heat dissipation design performance to extend LED lifespan.
Lifetime test for lightingUnder different current, temperature, and humidity conditions, continuously lit to evaluate light decay and lifespan performance.
Pulse Lifetime Test (IOL)Rapid and rigorous accelerated testing can truly simulate the actual switching operation state.
Environmental aging testsConduct salt spray or acidic gas corrosion tests for outdoor applications to examine the reliability of packaging and structure.
Mechanical stress testsTesting that includes simulated mechanical loads such as push-pull force, vibration, and impact.
Waterproof and dustproof testing (IP rating)Conduct protection level verification for the sealing structure of terminal modules.
lifetime estimation analysisUse activation energy calculation models to estimate actual lifespan.
Other testsIncluding solderability, pressure cooker test (PCT), thermal resistance, and other auxiliary evaluation items.

MA-tek not only providesLED Reliability and Lifetime Testing Services更導入integrating sphere optical measurement systemcan compare the changes in luminous flux, color temperature, and luminous efficiency before and after testing, helping customers quickly grasp the trend of performance degradation. At the same time, buildLarge constant temperature and humidity testing equipmentcan conduct long-term stability verification for LED modules, ensuring that the products maintain high reliability and stable output in harsh environments.

Frequently Asked Questions

Q1. What kind of measurement methods can LED products provide?

A. For LED products, a积分球 system has been established and regular calibrations are conducted with domestic accredited organizations to maintain measurement standards and consistency. The measurement services available include:

Measurement of LED luminous flux in lumens (Lm)
Measurement of LED spectrum
Measurement of LED color coordinates CIE 1931 (XY) & CIE 1976 (U'V')

Q2. Can AEC Q102 be executed?

A. Yes, the AEC Q102 specification has specifically added the gas corrosion items: single (H2S) and four types of mixed gases (FMG), dew point test (DEW), and pulse test (PLT) items, all of which have relevant instruments and equipment available for case execution.

Q3. How to cool down high wattage products?

A. For high wattage products, an effective solution to the problem of heat accumulation or poor heat dissipation caused by high wattage drive is achieved through a water cooling circulation system.

Q4. Can you provide a one-stop solution for packaging to testing?

A. Acceptable for customers to provide wafers or pre-packaged test samples, to carry out relevant testing preparation work through Bonding / Wire Bonding / SMT processes. In addition, packaging adhesive materials and fluorescent powder materials involve various companies' know-how, so such services are not currently provided.

Q5. Can LM80 testing be conducted?

A. Yes, the LM80 test requires three temperature points for high temperature: 55, 85, and the third temperature point is a self-selected condition (generally 105℃). The test point temperature must not be lower than the required temperature by 2℃, and the ambient temperature must not be lower than the required temperature by 5℃. The measurement time must be at least 6000 hours, with measurements taken every 1000 hours.

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