PenTile has the same number of pixels as a legacy stripe panel. It achieves this with one-third fewer subpixels, using subpixel rendering (SPR) technology, and adaptive filtering algorithms… but these panels still meet and exceed the rigorous requirements of the display industry for the definitions of resolution, measuring modulation contrast ratio of black and white lines through a moving aperture grille.
Take a look at the image below. That’s a comparison of RGB stripe and PenTile RGBW LCD. Hopefully this will help you see how four columns write a black and white line pair as compared to the six columns required for RGB stripe.
We love talking about this, so if you have questions, please feel free to comment.