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LED test conditions

What is an LED?

Light Emitting Diode (LED) is a special kind of diode. When a forward voltage is applied, the LED can emit monochromatic and discontinuous light, which is a kind of electroluminescence effect. By changing the chemical composition of the semiconductor material used, the light-emitting diode can emit light in the near ultraviolet, visible or infrared light. It is often used as an indicator light, a display panel, etc. at the beginning; it is also used as illumination with the appearance of white LEDs. It is known as a new type of light source in the 21st century. It has the advantages of high efficiency, long life, and is not easily damaged.

Different brightness according to brightness:

1-Traditional LED (consisting of materials such as GaP, GaAsP, etc.)

2-High brightness LED (consisting of AlGaAs material)

3-High-brightness LED and other materials.

☆. Infrared diode IRED: Different from the infrared emitted by the infrared light, different applications.

LED reliability test description:

The LED was originally developed in the 1960s when it was used in traffic signs or livelihood supplies until recently in lighting and as an alternative source of light.

LED life supplement information:

1. The lower the junction temperature of the LED (Junction Temp.), the longer the life of the LED, the higher the relative temperature and the shorter the life.

2. LED life at high temperature 74 ° C 10000 hours, 63 ° C 25000 hours

3. LED light source is an industrial product, so it needs to have a life of 35,000 hours (guaranteed use time)

4. The general lamp life is about 1000 hours.

5. Toyota's Lexus Ls600h has a LED headlamp with a service life of 10,000 hours (100 lm of luminous flux per LED)

6. LED street lamp life expectancy of more than 50,000 hours

LED test conditions: Temperature shock: Impact temperature 1 Room temperature impact temperature 2 Negative time cycle Remarks Remarks -20 °C (5min) 2min 90°C (5min) 2 Gas shock -30 °C (5min) 5min 105 °C (5min) 10 Gas shock -30 ° C (30 min) 105 ° C (30 min) 10 Gas shock 88 ° C (20 min) -44 ° C (20 min) 10 Gas shock 100 ° C (30 min) -40 ° C (30 min) 30 Gas impact 100 °C(15min) -40°C(15min) 5min 300 Gas impact high brightness LED 100°C (5min) -10°C (5min) 300 Liquid impact high brightness LED LED high temperature and high humidity: temperature and humidity condition time Remarks: 40°C/ 95% RH 96 hours 60 ° C / 85% RH 500 hours life test 60 ° C / 90% RH 1000 hours life test 60 ° C / 95% RH 500 hours life test 85 ° C / 85% RH 50 hours 85 ° C / 85% RH 1000 Hour life test room temperature life test: 27 °C 1000 hours continuous current continuous lighting high temperature life test: 85 °C 1000 hours continuous current continuous lighting 100 °C 1000 hours continuous current continuous lighting low temperature life test: -40 °C 1000 hours continuous current Lit -45 ° C 1000 hours of continuous current lighting tint test: Test conditions: Remarks: The LED foot (1.6mm from the bottom of the gel) is immersed in a 260°C tin bath for 5 seconds. The LED foot (1.6mm from the bottom of the gel) is immersed in a 260 5°C tin bath for 6 seconds. The LED foot (1.6 from the bottom of the gel) Mm) immersed in a 300 ° C tin bath for 3 seconds reflow oven test: 240 ° C 10 seconds environmental test (TTW solder treatment at 260 ° C ± 5 ° C temperature for 10 seconds) Test name reference standard reference JIS C 7021 test conditions content test temperature / dwell time reset cycle number (H) Temperature shock MIL-STD-883 method 1010 -55 ° C ← → 100 ° C, 15 minutes dwell, air-air storage. 5 minutes 50/100/1000 Temperature shock MIL-STD-883 method 1010 -40 ° C ← → 100 ° C, 15 minutes residence, air-air storage. 5 minutes 5/65/100/200 Temperature shock MIL-STD-883 method 1010 -40 ° C ←→100 ° C, 15 minutes dwell, <10 sec conversion, air-air storage. 15 minutes 5/50/100 power temperature cycle car specification -40°C ←→85°C, 18 minutes resident, 42 minutes conversion, current application, 5 minutes on/off 100/500 power temperature cycle car specification -40°C←→ 85 ° C, 15 minutes stop / conversion, current, 5 minutes on / off, 500h, 100h 100 power temperature cycle -40 ° C ← → 105 ° C, 15 minutes stop / conversion, current, 5 minutes on / off, 168h Temperature cycle 85°C/85%RH, current application, 500H/1000H Temperature cycle 60°C/95%RH, current application, 24h/168h/1000h High temperature storage JIS C 7021 Method B-10 110°C, 500H/1000H Environmental test (TTW solder treatment at 240 °C ± 5 °C for 10 seconds) Test name reference standard reference JIS C 7021 Test conditions Contents Test temperature / dwell time Reversion cycle number (H) Temperature cycle car specification -40 ° C ← → 100 ° C , 15 minutes residence 5 minutes 5/50/100/1000 temperature cycle 60 ° C / 95% RH, current 50 / 1000 humidity reverse bias MIL-STD-883 method 1010 60 ° C / 95% RH, 5V RB 50 /1000

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