"Another unusual aspect of the Nexus One display is that it uses a PenTile pixel arrangement, where there are only two sub-pixels per pixel instead of the usual three, Red, Green and Blue, that are used in most display technologies. Every PenTile pixel includes a Green sub-pixel, but the Red and Blue sub-pixels appear in alternating pixels. In principle, that is only a minor issue because if Red or Blue isn’t available in a particular pixel, then the display driver can just use one from an adjacent pixel. But In practice, it makes things a lot harder for the software and makes it very likely that artifacts will creep into the on-screen images. Note that a 800x480 PenTile display only has two-thirds of the total number of sub-pixels found on an 800x480 LCD, so it won’t be quite as sharp as a typical 800x480 display(Display Mate)."
簡單講就是傳統 LCD (電腦/哀縫用螢幕)上的像素是以RGB為一組 pixel 但是 N1的OLED是用"PenTile"方式排列, 所以它的一個pixel 是 RG 或 GB 彼此交錯排列(頗像相機的CMOS/CCD結構, 即綠色點是紅藍點數的總和) 所以如果這個 RG 的像點需要 B 的時候就會從隔壁借 B 這樣就可以得到需要的顏色