PiPo M6 Review - DPI Comparison Chart

Okay, so just to give you a grand range of "PPI" comparisons so you can get an idea of the sharpness level of this screen, I have put together a list of tablets and their display PPI ratings.

Google Nexus 7 (2nd Generation) Widescreen 7" 1920x1200 324 PPI
iPad Mini (2nd Generation) 4:3 7.9" 2048x1536 324 PPI
iPad 4th Gen/Air 4:3 9.7" 2048x1536 264 PPI
PiPo M6 - Full HD Mode 4:3 9.7" 2048x1536 264 PPI
FNF iFive X2 Widescreen 9" 1920x1200 251 PPI
Cube U30GT2 HD Widescreen 10.1" 1920x1200 224 PPI
Google Nexus 7 Widescreen 7" 1280x800 215 PPI
PiPo M6 - "Normal" Mode 4:3 9.7" 1528x1200 204 PPI
Samsung Galaxy Tab 1,2, & 3 (7" models) & Ployer Momo 7 Widescreen 7" 1024x600 170 PPI
FNF iFive Mini3 & iPad Mini (1st Gen) 4:3 7.9" 1024x768 162 PPI
PiPo Max M8 Pro Widescreen 9.4" 1280x800 160 PPI
Ployer Momo 12 & PiPo Max M9 Widescreen 10.1" 1280x800 149 PPI
PiPo M1 & iPad 2 4:3 9.7" 1024x768 131 PPI

That chart covers just about every major combination of screens currently available in "tablets". I define a traditional "tablet" as anything that is a single flat piece with a touch screen between the sizes of 7" - 10.1". So, all the odd 6" and 5" and 11" and 12" devices are something else IMHO. Yes they are very similar devices but when you get outside of that 7 - 10 screen range your usage changes drastically.

Regarding DPI and my personally defined categories...

  • Unacceptable: 120 PPI and down (i.e. cheap 10.1" devices at 1024x600... 117 PPI... awful...)
  • Acceptable: 130 PPI and up
  • Good: 160 PPI and up
  • Great: 200 PPI and up
  • Retina: 240 PPI and up
  • Pointless: Anything above 270 - 280 PPI - There just isn't a difference in display quality to the naked eye past this point... unless you are a genetically enhanced cyborg... (if so, please write in... we would love to blog about you!)

(For a different take from mine on this, read this Wikipedia entry on "retina" quality displays here: http://en.wikipedia.org/wiki/Retina_Display)

For those of you who are actually paying attention (snap to!) you probably noticed that the PiPo M6 was listed twice. This is due to a curious feature that is present on several Chinese 9.7" retina tablets that allows you to actually change the devices operating resolution. This is a REAL legitimate resolution change, not just a DPI switch in the build.prop file (for those of you who don't know about this small trick, you can adjust the DPI setting in a file in your android system and it changes the "look" of the screen to a certain extent but it is more gimmick than actual change...). So that means dropping the resolution does change the display quality, but it also increases performance. Giving end users options. I like options.

Keep reading for the significance of this small feature...