Ushahidi wa Mlipuko wa Shenhai
Kila sehemu ya bidhaa inaweza kuathiri maisha yake, so it’s crucial that all parts of a light fixture are of high quality to prevent various issues. Wateja wengi ambao hushughulika na taa mara kwa mara wanaweza kuwa wamekumbana na hali hii: mwanga wa LED usio na mlipuko usiowashwa. What could be causing this? Let’s explore together today!
Electrostatic Discharge (ESD):
The LED chip can suffer damage due to electrostatic discharge, rendering the PN junction ineffective and increasing leakage current, essentially turning it into a resistor. Preventing ESD damage to electronic components is a critical task in the electronics industry. Any issue at any stage can harm the Mwanga wa LED usio na mlipuko, leading to degraded performance.
Silver Wire Disconnection:
The internal silver wire connection in an LED light can break, causing a lack of electrical flow and resulting in a dead light phenomenon. This issue can also affect other LEDs’ normal operation, especially since LEDs work at low voltages (1.8V—2.2V for red, yellow, orange LEDs; 2.8—3.2V for blue, kijani, white LEDs) and are usually connected in series or parallel to accommodate different working voltages. If one LED in a series circuit has an open internal connection, the entire series will not light up, making this a more severe issue than others.
Leakage Current:
Excessive leakage current can cause the PN junction to fail, preventing the LED light from illuminating. Kwa ujumla, this issue doesn’t affect the operation of other LEDs.
Cold Solder Joint:
A cold solder joint occurs when the LED bead, or the chip, is not securely soldered. To diagnose this, heat the LED leads to 200-300°C using a lighter, then remove the heat source and connect a 3V button battery to the LED in the correct polarity. If the LED lights up but dims as the leads cool down, this indicates a cold solder joint. Heating allows the metal to expand and make contact with the internal solder point, enabling the LED to light up. As the joto decreases and the metal contracts, the connection breaks, and the LED turns off. This method is consistently effective in identifying cold solder joints.