LED light-emitting diodes (leds) welding process!
LED diode in the process of welding shall be operated strictly in accordance with the following requirements:
1, workers production must wear anti-static gloves, anti-static wrist, soldering iron must be grounded, it is strictly prohibited to unarmed lead feet touch the white LED. For white LED anti-static is 100 v, and people on the work bench work humidity is 60% 90% of the human body static electricity can damage the crystallization of light-emitting diodes (leds) layer, work after a period of time ( Such as 10 hours) Diode will be failure, serious will immediately be invalidated.
2, welding temperature is 260 ℃, 3 seconds. Temperature is too high, time is too long will burn out the chip. In order to better protect the LED, LED colloid more than 2 mm intervals should be maintained with PC board, so that the welding heat except through pins.
3, LED to the normal work of the current 20 ma, tiny fluctuation of voltage ( Such as 0. 1 v) Will cause the current volatility ( 10% - 15%) 。 Therefore, in the circuit design should be based on the LED when the pressure drop of matching different current-limiting resistance, in order to make sure the LED in the best working state. Electric current is too large, the LED may shorten, the current is too small, can not meet the required light intensity. My company will be LED in bulk supply spectral color separation, are all the LED light intensity in the same package products, voltage, light color is consistent, and marked on the spectral color table.
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