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Angular resolution is much more important than the actual surface DPI. Depending on you viewing distances and the quality of your vision 4K on a 14" laptop is n

Angular resolution is much more important than the actual surface DPI. Depending on you viewing distances and the quality of your vision 4K on a 14" laptop is needed or 1080p on a 27" screen is more than enough. Your requirements are extreme compared to most.

4ad 5y ago
Yes, angular resolution is all that matters, which is why books, which are supposed to be used closer than any screen have been at least 300dpi since we have invented phototypesetting.
- pedrocr 5y ago
  We can discuss how much angular resolution is enough but we clearly don't need 300dpi for a billboard. To get the same font quality when looking at a phone, laptop or external screen a different dpi will be needed. Here's Apple's range of Retina displays: https://en.wikipedia.org/wiki/Retina_display#Models https://en.wikipedia.org/wiki/Retina_display#Models The DPI difference between highest (iPhone 12) and lowest (Pro Display XDR) is 2.2x. The angular resolution difference at typical viewing distance between those two screens is 1.1x. Clearly the angular resolution at typical viewing distance is a much better definition of what's good enough resolution than the DPI.
  - 4ad 5y ago
    Yes, and with the exception of a discontinued LG monitor, and a $4k Dell display that doesn't work on macOS, nor on Linux with OSS drivers, no external non-Apple display can provide the required angular resolution.
    - pedrocr 5y ago
      That totally depends on what angular resolution you require and what distance you are comfortable with. Using that list Apple's Retina concept starts at 57 and 4K 27" is ~60. And even that is assuming you place a 27" screen the same distance away from your eyes as a 24" or even 21" screen as all the iMacs use the same viewing distance. But I'm glad we got over the idea that 220dpi is a magical number. Otherwise not even the iMac or the Apple Pro XDR displays counted as HiDPI.

4ad 5y ago

Yes, angular resolution is all that matters, which is why books, which are supposed to be used closer than any screen have been at least 300dpi since we have invented phototypesetting.

pedrocr 5y ago
We can discuss how much angular resolution is enough but we clearly don't need 300dpi for a billboard. To get the same font quality when looking at a phone, laptop or external screen a different dpi will be needed. Here's Apple's range of Retina displays: https://en.wikipedia.org/wiki/Retina_display#Models https://en.wikipedia.org/wiki/Retina_display#Models The DPI difference between highest (iPhone 12) and lowest (Pro Display XDR) is 2.2x. The angular resolution difference at typical viewing distance between those two screens is 1.1x. Clearly the angular resolution at typical viewing distance is a much better definition of what's good enough resolution than the DPI.
- 4ad 5y ago
  Yes, and with the exception of a discontinued LG monitor, and a $4k Dell display that doesn't work on macOS, nor on Linux with OSS drivers, no external non-Apple display can provide the required angular resolution.
  - pedrocr 5y ago
    That totally depends on what angular resolution you require and what distance you are comfortable with. Using that list Apple's Retina concept starts at 57 and 4K 27" is ~60. And even that is assuming you place a 27" screen the same distance away from your eyes as a 24" or even 21" screen as all the iMacs use the same viewing distance. But I'm glad we got over the idea that 220dpi is a magical number. Otherwise not even the iMac or the Apple Pro XDR displays counted as HiDPI.