lol well bearing in mind the workings of a digital readout display, there are several types with several formats of projection, colouring, etc so the information could be shown on different lines so the optical scanner point would have to refresh at 25.5 frames per second. therefore the system has to handle that with a converter from optical to data to speach. therefore the data chain of events has to be tight locked and calibrated. I can see many problems with this lkind of device. as an example I have a planer thicknesser with a computer controlled rise and fall table and the LCD will show multiple information. as each LCD or LED screen is a differing size it remains a problem for any manufacturer. lew
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