Electronics > Projects, Designs, and Technical Stuff
Which display technology has the longest life?
texaspyro:
The main failure in 7-sgement LEDs seems to be missing segments. A lot of the failures seem to be caused by bond wire failure between the die and the lead frame. Apparently the material of the LED die behaves differently than silicon.
cvanc:
--- Quote from: texaspyro on August 10, 2019, 02:51:28 am ---... I hate waking up more than a millisecond early.
--- End quote ---
"EEVBlog Phrase Of The Day" :-+
David Hess:
--- Quote from: texaspyro on August 10, 2019, 04:18:42 pm ---The main failure in 7-sgement LEDs seems to be missing segments. A lot of the failures seem to be caused by bond wire failure between the die and the lead frame. Apparently the material of the LED die behaves differently than silicon.
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That certainly happens but I do not remember encountering it myself. I know others who have.
texaspyro:
--- Quote from: David Hess on August 10, 2019, 04:24:04 pm ---That certainly happens but I do not remember encountering it myself. I know others who have.
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I once came across a failure analysis report that had the gory details...
A friend of mine worked in the semiconductor business and had access to all sorts of chip prototyping equipment. He had one of the first LED watches with green displays. One of the segments died. He really liked the watch and spent a weekend digging into the display package and re-bonding a connection.
SiliconWizard:
--- Quote from: David Hess on August 10, 2019, 04:24:04 pm ---
--- Quote from: texaspyro on August 10, 2019, 04:18:42 pm ---The main failure in 7-sgement LEDs seems to be missing segments. A lot of the failures seem to be caused by bond wire failure between the die and the lead frame. Apparently the material of the LED die behaves differently than silicon.
--- End quote ---
That certainly happens but I do not remember encountering it myself. I know others who have.
--- End quote ---
Never seen that either. Missing segments in LCD displays OTOH, quite often.
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