Aging Test Chamber

• Summary for LED Testing Conditions

  Apr 22, 2025

  What is LED? A Light Emitting Diode (LED) is a special type of diode that emits monochromatic, discontinuous light when a forward voltage is applied—a phenomenon known as electroluminescence. By altering the chemical composition of the semiconductor material, LEDs can produce near-ultraviolet, visible, or infrared light. Initially, LEDs were primarily used as indicator lights and display panels. However, with the advent of white LEDs, they are now also employed in lighting applications. Recognized as the new light source of the 21st century, LEDs offer unparalleled advantages such as high efficiency, long lifespan, and durability compared to traditional light sources. Classification by Brightness: Standard Brightness LEDs (made from materials like GaP, GaAsP) High-Brightness LEDs (made from AlGaAs) Ultra-High-Brightness LEDs (made from other advanced materials) ☆ Infrared Diodes (IREDs): Emit invisible infrared light and serve different applications.   LED Reliability Testing Overview: LEDs were first developed in the 1960s and were initially used in traffic signals and consumer products. It is only in recent years that they have been adopted for lighting and as alternative light sources. Additional Notes on LED Lifespan: The lower the LED junction temperature, the longer its lifespan, and vice versa. LED lifespan under high temperatures: 10,000 hours at 74°C 25,000 hours at 63°C As an industrial product, LED light sources are required to have a lifespan of 35,000 hours (guaranteed usage time). Traditional light bulbs typically have a lifespan of around 1,000 hours. LED streetlights are expected to last over 50,000 hours.                         LED Testing Conditions Summary: Temperature Shock Test Shock Temp. 1 Room Temp Shock Temp. 2 Recovery Time Cycles Shock Method Remarks -20℃(5 min) 2 90℃(5 min)   2 Gas Shock   -30℃(5 min) 5 105℃(5 min)   10 Gas Shock   -30℃(30 min)   105℃(30 min)   10 Gas Shock   88℃(20 min)   -44℃(20 min)   10 Gas Shock   100℃(30 min)   -40℃(30 min)   30 Gas Shock   100℃(15 min)   -40℃(15 min) 5 300 Gas Shock HB-LEDs 100℃(5 min)   -10℃(5 min)   300 Liquid Shock HB-LEDs   LED High-Temperature High-Humidity Test (THB Test) Temperature/Humidity Time Remarks 40℃/95%R.H. 96 Hour   60℃/85%R.H. 500 Hour LED Lifespan Testing 60℃/90%R.H. 1000 Hour LED Lifespan Testing 60℃/95%R.H. 500 Hour LED Lifespan Testing 85℃/85%R.H. 50 Hour   85℃/85%R.H. 1000 Hour LED Lifespan Testing   Room Temperature Lifespan Test 27℃ 1000 Hour Continuous illumination at constant current   High-Temperature Operating Life Test (HTOL Test) 85℃ 1000 Hour Continuous illumination at constant current 100℃ 1000 Hour Continuous illumination at constant current   Low-Temperature Operating Life Test (LTOL Test) -40℃ 1000 Hour Continuous illumination at constant current -45℃ 1000 Hour Continuous illumination at constant current   Solderability Test Test Condition Remarks The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 260 °C for 5 seconds.   The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 260+5 °C for 6 seconds.   The pins of the LED (1.6 mm away from the bottom of the colloid) are immersed in a tin bath at 300 °C for 3 seconds.     Reflow soldering oven test 240℃ 10 seconds   Environmental test (Conduct TTW solder treatment for 10 seconds at a temperature of 240 °C ± 5 °C) Test Name Reference Standard Refer to the content of the test conditions in JIS C 7021 Recovery Cycle Number (H) Temperature Cycling Automotive Specification -40 °C ←→ 100 °C, with a dwell time of 15 minutes  5 minutes 5/50/100 Temperature Cycling   60 °C/95% R.H, with current applied   50/100 Humidity Reverse Bias MIL-STD-883 Method 60 °C/95% R.H, 5V RB   50/100  

  hot Tags : Thermal Shock Chamber climate test chamber Temperature and Humidity test for LED Rapid Thermal Cycling Chamber Simulation Chamber Aging Test Chamber

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