Satya's blog - LCD Flat panel power consumption

Feb 17 2007 13:14 LCD Flat panel power consumption

40 mA 2 watts on standby versus 350 mA 25 watts on full power. 19" flat panel. Compare 60+ watts for a 17" CRT at 820 mA.

Okay, a table:

LCD/CRTCurrentPowerVoltage (calculated)
19" Flat-panel standby 40mA 2W 50V
19" Flat-panel full power 350mA 25W 71.42
17" CRT 820mA 60+W 73

Obviously, the numbers are wrong. The voltage was always 120V.

Updated again: Obviously, the simple P=VI formula doesn't apply for inductive and capacitive loads. See "power factor".

Updated again: I went alittle nuts with the meter. An incandescent 3-level bulb takes 50-100-150Watts at about 300-400mA for the lowest (or middle? I don't remember and am too lazy to measure again) setting. A CFL bulb takes 10-19-28 Watts at about the same current, because of power factor. This meter does have a PF setting.

Last updated: Feb 26 2007 23:14

Tag: geeky