Screen burn-ins causes Apple to seek Samsung’s help

Apple’s site says that iPad mini with Retina display will come at 29th November, Friday. This is a turn from Apple’s trend of releasing new products shortly after their announcements. The company also contacted Samsung and LG Display after Sharp had issues with 7.9-icnh resolution panels – the reason behind limited launch supplies. 

A new report reveals that LCD panels from Sharp are facing burn-in problems, again leading Apple to seek Samsung’s help. The Korean publication, ETNews, says that Apple may increase transactions with Samsung if Sharp fails to solve IGZO panels burn-in issues. Sharp’s TFT (or thin-film transistor) is the center of the issue.

IGZO panels first were used in the iPad Air. The burn-ins are not meeting Apple technological standards, and the IGZO panel is also facing problems in supply:
The burn-in problem was caused by the drastic reduction of the pixel size. The resolution of the 7.9-inch iPad mini with Retina display is 2048×1536, about four times clearer than the existing 1024×768 products. LG Display used the amorphous silicon (a-Si) for the substrate, whereas Sharp used IGZO. 
The pixel of the smartphone display is smaller than that of the iPad mini Retina panel, but as the Low Temperature Polycrystalline Silicon (LTPS) technology is used, it can be produced stably. The pixel of the iPad mini Retina is the smallest among those products using a-Si. Sharp failed to solve the chronic problem of IGZO, i.e. uniformity, and its yield went down.
This has led Apple to make negotiations with Samsung Display for supplies from 2014. Apple needs 15 million panels from Sharp and LG Display, at a 40 to 60 percent ratio. Samsung was also supposed to be the original supplier, but things didn’t turn out well.


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