http://www.displaymate.com/OLED_Gal..._ShootOut_1.htm

OLED Galaxy S III and iPhone LCD Power Efficiency Comparisons: Typical full screen text applications (on a white background) have an Average Picture Level APL of 90 percent or more, so we expect LCDs to do better. On the other hand, typical full screen video and photographic images have an APL of 20 percent or less, so we expect OLEDs to do better there. From our Luminance, Power, and screen Area measurements we can determine exactly which is better, when, and by how much. Comparing the Galaxy S III and the iPhone 4, images with less than 28 percent APL are more power efficient on the Galaxy S III, and greater than 28 percent are more efficient on the iPhone 4 – so the Galaxy S III is somewhat more efficient for videos and significantly less efficient for text applications. But the iPhone 4 uses an LCD with Low Temperature Poly Silicon that is significantly more efficient than typical LCDs with amorphous Silicon, such as the iPhone 3GS – where the crossover is a lot higher at 69 percent APL, so it’s a split decision there depending on the application mix…

基本上iPhone 4 的LPTS LCD + LED backlit 在 APL (Average Picture Level) 28%以上的圖像就比 Samsung Galaxy S3 的 AMOLED 還要 power efficient.

在全白螢幕下 Running Time on Battery 測試部分 差距更大.

For comparison, note that the iPhone 4 has a running time of 7.8 hours with a screen Brightness of 541 cd/m2 while
the Galaxy S III has a running time of 5.6 hours with a screen Brightness of 224 cd/m2.