Recently I purchased a UC-Logic graphics tablet and while giving feedback about the product to the company representative, I brought up the issue of tablet resolution. This is often measured in lpi or Lines Per Inch with some tablets going as high as 5000 lpi. My concern with the UC-Logic tablet was that it had a quoted lpi of 2000 while the Wacom range quote figures as high as 5080 lpi.
The response that I received from UC-Logic was that some companies use the lpi figure as a marketing trick, by using the maximum reachable lpi instead of the normal operating one. On the box of the UC-Logic tablet the resolution is quoted as 2000 lpi and I have now been informed that this is the resolution at normal operation but a maximum resolution of 4000 lpi can be reached. I am still not sure how this resolution is changed or under what conditions.
The representative explained to me that resolutions higher than 1000 lpi don’t mean anything in real life applications. For example at a resolution of 2000 lpi, each inch has 2000 lines and the width of each line should be 0.0127 mm (1 inch = 25.4 mm, 25.4/2000=0.0127). The pen tip diameter is about 0.5mm and has covered more than 39 lines already, that means if the lpi is over 1000 then it will be sufficient for all practical uses.