You will find most LCD modules to be really low power for the LCD controller chip and the display glass itself. It is not untypical to find these at less than a few mA current draw.

Much more power is consumed in providing backlight to a display so that it can be viewed in low light or dark conditions.

If you are interested in making a "meter" type display you may want to look at a graphics type LCD module. Upon these you can control the display image at the pixel level.

I have used a 106x56 pixel graphics LCD module that is fabricated with COG technology. I like this type module because they are so compact and easy to connect into a microcontroller system. The display I used consumes less than 0.5 mA at 3 VDC. Here is a picture of a display of this type. This link will connect you to the Tianma Web Site.



Michael Karas