IGZO based display and battery life

IGZO is named after indium gallium zinc oxide. It is a material with special properties and can be used in liquid crystal display (LCD) to replace the traditional layer of silicon. It is reported that energy consumption would be lowered to 1/5 to 1/10 of the traditional TFT, 
 it used only a quarter of the power of its competitor when idle, and about 25 percent less during active use. This technology also allows more pixels in per unit area of the display, which would make the images displayed on the screen more clearer and sharper, and more accurate touch response or quicker response speed.

At CEATEC 2012, Sharp introduced its new 5-inch 1080p LCD smartphone display at 443 ppi, they also showed a 6.1 inch IGZO based display with 498 ppi. Later Sharp introduced the first IGZO panel smartphone, Sharp's SH-02E, and it also launched a 7-inch Tablet with IGZO LCD Screen of 1280x800 resolution, 217 ppi. This week, HTC announced HTC J Butterfly, it has a 5 inch LCD3 1080 HD, 441 ppi display.

In the comments on the reports, people are worrying about the battery life of these new devices, because as more pixels packed into the display, more energy would be needed to light up the display. However if the report of the energy efficiency feature of this new technology is true, the battery would have a decent life span on these devices.