Tuesday, March 20, 2012

5 Reasons Why The New iPad Runs Hotter Than The Old Ones

CNET interviewed Raymond Soneira, President of DisplatMate Technologies, regarding the problems of the heat that comes from the new iPad. He offered a few reasons why:

  1. Twice the LEDs: That means more heat coming from more LEDs. This is especially a problem at full brightness. 
  2. 2.5X the power needed: The brightness efficiency is lower because the new iPad has more pixels (which means more transistors) compared to the iPad 2. More pixels and transistors take up more space, meaning less opportunity for light to pass. "So they basically have to blast light through the LCD to make it come out." Soneira adds: "I measured the LED power at maximum brightness--it's two and a half times greater than on the iPad 2." 
  1. Battery generates more juice: The battery has to push out more power. This makes the battery warmer. 
  2. Traditional LCD technology: Sharp's power-efficient IGZO technology was not ready for the new iPad. That forced Apple to use traditional--and less power efficient--amorphous silicon tech. 
The iPad's new A5X chip with quad-core graphics may be another factor to a warmer iPad. The new chip is faster and larger, which typically leads to more heat.

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