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In-cell technology refers to a standard of displays that emerged in 2012 and allow mobile devices, such as smartphones, to have thinner form factors. They also allow devices to keep a low weight even when the display increases in size.
In-cell displays are revolutionary in the sense that they combine a digitizer, use touch input, and integrate an LCD screen into a single-layer display. Some reports also suggest that in-cell technology displays provide better resolution compared to standard LCD screens.
In-cell technology may also be called in-cell touch technology.
The term in-cell display emerged in 2012 in reports that Apple's successor to the iPhone 4S would include this new technology, thus reducing the thickness of the screen.
Less advanced touchscreen devices, including many smartphones and tablets, tend to have two separate display layers that need to be combined internally. The digitizer is used for touch sensitivity while the LCD screen displays the on-screen images. In-cell display technology combines these layers into a single layer, allowing devices to be thinner and lighter.