Quote:
SIGNAL LATENCY can be thought of the time that an electrical input takes from the time it is requested at the "input" to the time it is done being processed digitally and finally executed at the "output". This is always present whenever digital components are involved, for example in digital receivers, LCD screens, Dolby Digital amplifiers, etc, and is often in the range of 30ms.
Analog CRT and analog audio amplifiers respond more or less in "real time" to their inputs (less than 0.05ms), because there is no way of storing and delaying the data - it has to be outputted, or else it is lost (due to "limited bandwidth", but here analog bandwidth is meant, e.g. what frequency can still be reproduced).
On the other hand, digital components like LCDs and dolby digital receivers first need to do some processing on the digital data that they have received. It is buffered, sent through some CPU cycles on the component's DSP, and finally D/A converted to drive the pixel or the actual speaker. All this takes a bit of time. Hence there is always some signal latency, and it seems to be particularly big on the 2405fpw. They should give it faster electronics, i.e. a faster DSP chip to take care of the scaling and input signal execution. I bet this is where some of the comparable but much more expensive 24" LCDs have their competitive edge.
Taken from here. Soup's Link.