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Monitor Draws Zero Power In Standby
fifthace writes "A new range of Fujitsu Siemens monitors don't draw power during standby. The technology uses capacitors and relays to avoid drawing power when no video signal is present. With political parties all over Europe calling for a ban on standby, this small development could end up as one of the most significant advances in recent times. The British Government estimates eight percent of all domestic electricity is consumed by devices in standby."
I just want an Off switch on my printers and scanners! Or if they do have one, put it in the front. I use my scanner once a month, it's crazy to leave it plugged in all the time (no power switch). My printer's power switch is way around at the back, hard to reach - I only print once or twice a week. At least my LCD has an off button on the front, but it is never really off.
The biggest wastage in taditional designs is that they use switch mode power supplies designed to run at full power. They don't operate very efficiently at very low (standby) power. It is far better to completely turn off the power supply and just use a local capacitor to keep the micro going.
Engineering is the art of compromise.
CRT != LCD...
I like this trend. If a device wants to consume 0 power on standby then it finally means that they'll stop putting those damn blue LEDs on everything electronic. Then I could have a dark bedroom at night without the use of electrical tape.
They're referring to the electronics standby not computer OS standby. Nearly all electronic devices (TVs, monitors, computers, etc) are on standby unless they're unplugged. This allows you to turn on the device with an electronic switch or a remote rather than a physical switch because part of the electronics are still "on". The surprising thing is some electronics are incredibly inefficient at standby. I tested some PSUs which would use 4 watts while the computer was "off". If you start adding up the number of electronic gadgets in your home, the watts start adding up all while your stuff is doing absolutely nothing.
I built a relay and cap circuit when I was in highschool to turn AC circuits on and off with a standard momentary push button. The result, zero stand-by current. holding the momentary switch completed a circuit which would cascade and latch a larger relay. This relay would hold itself closed until you interrupted the power. Simple, and makes a satisfying click.
I'm not sure how you can patent something that 1-2% of EE students discovered on their own.
“Common sense is not so common.” — Voltaire
Well, he was talking about CRTs. And you are wrong on both counts. On a CRT more current flows to make the screen white. For an LCD, just remove the signal or power from the screen, but not the light and the pixels go "black". However...transmitting black over air takes more energy. And the sync pulse, even more.
What?