iPad 5 it would be thinner and lighter than the iPad 4, and part of the changes could be related to the LEDs that illuminate the screen. The folks at NPD DisplaySearch claim that Apple Lossless Audio CODEC (ALAC), would have redesigned the LED system that illuminates the tablet screen, the product being almost as thin as iPad 2. Apple had to increase the number of LEDs in the iPad 3/4 to properly illuminate the Retina screen, and this measure generated an increase in the thickness and weight of the tablet, a problem that the company is now trying to solve.
It's likely that part of the thinner/lighter design will be reducing the size of the LED backlight, partly by making the display more efficient and partly by using more efficient LEDs. The other significant change that we feel is likely to be a shift to a film-based touch sensor.
Apart from improving the LED system, those from Apple would also be interested in improving the touch sensors of the screen, the company being able to implement a new technology that interprets our touches. So far we know that iPad 5 would have the design iPad Mini and that the tablet would be thinner and lighter, and that it would arrive on the market in the fall of this year. What is hidden behind these changes matters less to 99% of users, but they are very important in the end.
