LCD DPI and image size


Thank you for the great library.

I have question about screen DPI and image size.
In 130 DPI, 1.2 inch LCD display.
PNG image is 72 dpi, so Should I use large png images and size down for the best display quality?
I mean, if I want display a 20*20px icon on LCD with best quality,
72dpi : 20px = 130dpi : (X)px
(X) is 36.1px
import 36px png image, and display it resizing to 20px is the best way to display?

I’ve tried to do that, but I could not see any differences with my eyes.
I just want to use 130 DPI screen resolutions for the image quality.

Thank you for your concerns,



Ultimately only the resolution matters. 130 DPI tells only that 130 px result in 1 inch size. For 72 DPI its 72 px.

No magic here :slight_smile: A 20x20 image is a 20x20 image on all device but will look smaller on a 130 DPI display.

Ah… I see. I am totally misunderstanding about DPI. Thank you so much :slight_smile:

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You are welcome! :slight_smile: