FAQ: LED display Death Lamp Situations (Part 1)

There is often encounter the situation that LED isn’t shine, the industry name it the phenomenon of death lamp. The encapsulate enterprise, application companies and the user of units and individuals, whom is likely to encounter. There are two reasons for this:

First, LED leakage affect the failure of PN junction, so that the LED lights don not bright, but generally has not the effect of other LED lights work.

Second, the internal connection wire of LED lights was cut off, resulting in no current through and appear dead lights. This situation will affect the normal work of other LED lights, because the LED lamp is operating in low voltage (the working voltage of red and orange LED is 1.8V to 2.2V; blue, green and white is 2.8V to 3.2V), generally used in series, in parallel to connect, to adopt to different operating voltage. The more LED lights in series, the more better impact, as long as an internal line of LED lights open circuit, will cause the whole series circuit of LED lights is not on. It is more serious than the first circumstance.

LED death lamp is the key issue which affects the quality and reliability of products, how to reduce and eliminate death lamp, improve product quality and reliability, and become the key issues need to be solved by packaging and application companies.

Next chapter: LED death lamp cuases and solutions

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