I'm designing for a screen that has the following specifications:
Screen Size 272 x 480 dots
Pixel Size 0.198 x 0x.198 mm
Actual Area 95.040 x 53.856 mm
53.856 mm = 2.12 inches
95.040 mm = 3.74 inches
272 / 2.12 = 128 pixels / inch horizontal
480 / 3.74 = 128 pixels / inch vertical
I have, say, an icon in Illustrator. It is 13px x 20 px (the Artboard is 272 x 480). When I export it at 72 dpi, it comes in at the right size, but this is half the pixel density that the screen is capable of. When I try to export it at 128 dpi, it becomes larger.
Note: I do not have 'use artboards' checked, because I want to just export this one icon.
This doesn't quite make sense to me, Is there a way that I can constrain the size in physical units (mm, in) and still have the resolution that I need?
Thank you for your help!