Hello too. I heard somewhere that old flat screens and notebooks used mercury vapor lamps. Is that really true? Nowadays, we only know LED backlighting. Would that pose a risk of mercury leakage in older devices? Thanks in advance. Regards, Dirk
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@Commodore64: Thank you. Under “normal” circumstances, there should be no “breaking” likely, right? When were these cold cathode tubes used to illuminate flat screens?
Again, a very good question: “Today you know…” – who always knocks such a bullshit? And honestly, if you have such great sources of news, why do you need any answers in here if you’re sleeping with such claims? Sorry… but this “man says yes / weis yes…” => just go to this Lord “man” who knows “yes” and just ask!
Thanks for your very nice comment… not!
Hello,
This, however, has been very long with the mercury lamps and the cement actually contained only in traces and under a vacuum.
I had a bottle of mercury in my laboratory stock and smelled once (was odorless) and didn’t fall dead. ALso no drama.
In recycling, where large quantities of it can arise because of the tons-heavy material that is processed there the danger will probably be more present. In the meantime, there are no toxic materials.
LG
Harry
Yes,
Before there were usable white LEDs, cold cathode tubes were used. They were filled with argon and mercury vapor.
Since they are under reduced pressure, a tiny amount of mercury is sufficient, which is then completely evaporated. Break them, so escapes a very small-less mercury.
However, this amount is extremely low. As long as the contents of the tube are not specifically inhaled, no significant amount of mercury can be absorbed. Over the years, you will certainly get more mercury over food.
@Commodore64: Thank you. Under “normal” circumstances, there should be no “breaking” likely, right? When were these cold cathode tubes used to illuminate flat screens?
It’s bad to say. Sometime after 2010, the LEDs were not only better but also significantly cheaper. From then on, it made no sense for manufacturers to use anything else. Longer time before 2010, white LEDs haven’t been much yet and were still very expensive and short-lived.
So one can say that there were both around 2010, before 2005 there were only cold cathodes or other “conventional, non-LED” lighting.
In industry, for example, in CNC machines, cold cathodes are still used—albeit extremely rarely by now. Simply because the 24/7 must shine and you can easily replace the tubes. In addition, they have a redundancy, if one of the tubes is broken, the machine operator can still continue to work and order the customer service. in practice, the customer service is called when the last tube is broken;)
In the 1980s there were also LED backlights, but then monochrome so usually orange or yellow. White LEDs were only possible when the early 1990s blue LEDs had become possible and had only a few 100 hours until their half luminosity had lost. White LEDs are blue LEDs or UV LEDs with fluorescent since LEDs can generate only a single light frequency (monochromatic). The phosphor then converts one frequency into a frequency mixture that is then as white as possible.
The latest monitor/laptop I’ve broken was about 10 years old. He still had tubes.
These are glass tubes. Glass holds high forces, but can easily break through impact or strong bending.
Thanks again for your detailed descriptions. Allow me to ask this last question: stable, however, are these tubes already so that they do not just break up if you do not dismantle the device “intentionally”, are they?
Thanks for the detailed explanation
Have you ever seen a mercury vapor lamp? Apart from the heat development and power consumption, a part of the size does not fit into the devices. In addition, the illumination would be too punctual.
In fact, there were mercury hated lighting solutions, see above. But think the risk is low.