Solved Responsive Web Design Accounting for Screen DPI

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peterinwa

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May 29, 2004
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All the tips on RWD refer to the screen resolution of the device in terms of number of pixels in the X and Y axes. But what about the screen resolution in terms of DPI or dots (pixels) per inch?

Some RWD tutorials suggest using a smaller size font for smaller devices. However, many of the smaller devices have greater DPIs so wouldn't that already make the fonts smaller?

For example, if an iPhone has twice the DPI of an iPad, wouldn't a 20-pixel character appear half the size on the iPhone versus the iPad?

I can't find anything that discusses taking screen DPI into account in responsive web design.

What am I missing?

Thanks so much,

Peter
 
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Sep 21, 2007
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dots per inch depends on your device. Some devices have bigger pixels, hence less dpi. Some devices have smaller pixels, hence more more pixels per inch. Since there the developer don't know what device the user may use, the only real measurement he could program for is pixel count.
 

peterinwa

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May 29, 2004
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122
Thank you. That makes sense. I just wanted to be sure I wasn't missing something.

If you would read the DPI of the device, you could do more to control the appearance of the image.
 
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