認識解析度

start
http://upload.wikimedia.org/wikipedia/commons/c/ca/Video_Standards.svg

http://wapedia.mobi/thumb/1b79495/en/max/470/360/Vector_Video_Standards2.svg?format=jpg%2Cpng%2Cgif
HGA: 480x320
WVGA: 800x480
WSVGA: 1024x600

DPI:
* QVGA, 120 dpi
* HVGA, 160 dpi
* WVGA, 160 dpi
* WVGA, 240 dpi
* FWVGA, 160 dpi
* FWVGA, 240 dpi