LCDs are the displays used for absolute minimum current draw - such as in digital watches.
The SPLC780D chip that is used in the 1602 LCDs to which you refer has a specified logic operating current of 200µA - two hundred microamps. There is a second chip as well, it draws perhaps another 50 microamps.
You are confusing the current drawn by the LED illuminant. Necessarily, anything which lights up so you can see it better, especially in dim light, must draw substantial power. If you are happy to work in daylight, then an LCD - without the backlight - is the way to go.
Its my mistake i was considering values against wrong attibutes.
Now thing is The current is in Milli Amps.
Are you sure that the LCD ( generic ) (16x2 or 20 x 4 ) draws 200uA as its functional requirement?
Please provide me link for the same so i will read the informations.
The SPLC780D chip that is used in the 1602 LCDs to which you refer has a specified logic operating current of 200µA - two hundred microamps. There is a second chip as well, it draws perhaps another 50 microamps.
Yes, well, I was referring to one sort of controller chip, if it is a different controller, the specifications will of course differ. No surprises there.
Part of the multiplexing arrangement on the LCD board is a chain of five 2.2k resistors dividing up the 5V supply, so these alone will draw about 500µA in addition to the controller chips themselves.
The point remains that even a power indicator LED (which are now highly efficient) included on a module will draw at minimum, a couple of milliamps.